Include name as well so that we can download your creations.

Haha the Bombcast Ryan's pretty awesome.
 
I suppose the "best" thing I've made is my Super Speed Fighter car which has had over 1,000 downloads. But I'm not sure it's really worthy of all those. I'm quite pleased with my UPS truck too.
 
I definitely think my track is best though - but sadly no-ones really downloading it. It's called "Alpine Kick-Asphalt", it's got some cool jumps and drifts in it.

Guess the best thing I've made is the D.K. Jungle Parkway remake that has over 1000 downloads.

Same as @get2sammyb I think it's not my best track though. I think this one is:

Freefall Island

I've made 3 mods that I think are all awesome.  Just search for what they are to find and download them.

Gallery

These topics make me wanna buy the game and someone has to mention the Luchadeer mod that someone created.

" These topics make me wanna buy the game and someone has to mention the Luchadeer mod that someone created. "

I quite like my new track but I know I can do better yet... 
 
http://community.modnation.com/en-us/players/Phicey/creations/434332

i made a pretty decent Giant Bomb kart that im proud of. just search for karts with the name p0rcupinetreefan

I made a Francis York Morgan mod, complete with cigarette and face scars. The only issue is that I don't have the proper suit and tie combo unlocked. So he has a tux, but oh well, I'll fix it when I get those parts.   Here's him riding my shitmobile: 
 

Not sure if this link will work 
http://modnation-production.s3.amazonaws.com/player_creations/446558/preview_image.png     
My Faith from Mirror's Edge mod. Not a great picture as you cant see her white stripes down the side of her top or the tattoo on her arm 
 
Also made a Persona 3 MC mod 
http://modnation-production.s3.amazonaws.com/player_creations/430455/preview_image.png  
He's not too bad but there's no decent jacket so I had to make him with just a shirt. 
 
Names airules btw. 
 
Share and enjoy 

Tombi's fantastic. I didn't know Modnation.com stored all your creations. Here's some of my stuff that I think's worth checking.
 

I made this track, which I kinda liked it (and yes I know that I suck at coming up with good names for my tracks).

Here's my Rhino I just put up. I have made a few improvements since the last one I posted.

I seriously should order this game, it looks amazing.

Ok, now this is my new favorite creation.  This is a boy who threw on his batman pajamas and made a batmobile with whatever he could find in the garage.

I once took a crap that came out looking like a Jesus fish. 
 
 
Oh, this is about modnation racers....nevermind.

My Giantbomb Cart WIP*. Original thread here. 

How you guys getting pics from the creation shop area?  Capture card for your PS3 or something?  Won't let me take a pic of my little guy outside a vehicle that I can figure out anyway.
 
There are a few crappy Frank Wests from Dead Rising out there.  I made a couple that I submitted but I made a final version that I just got done with along with a vehicle to go with him.  I went with the convict's Jeep from the game.
 
If you want it search for "Frank West Final" for Frank and for the vehicle search "Dead Rising Jeep."  The creation tools are fun to use but I'm a bit disappointed...they feel a little limited.  Overall the game is a blast tho.
 

It was in the beta, but I made a course where you had to drive up the side of a mountain.  I hope to recreate it in the full game (when I buy it, after exams...).

there's a couple of unbelievable good John Marston (Red Dead Redemption) mods that I've seen on the official forums.  I'll link if I can find em because they are really really good.
 
edit:
the best one imo, I love how they did the stubble-
 http://community.eu.playstation.com/t5/ModNation-Racers-Kart-Track-and/John-Marston-from-Red-Dead-Redemption/m-p/10840528

I got the game yesterday and spent most of my time crafting a rather cute Harley Quinn mod (I've been a fanboy for half my life naow, yes I am sad :D ) It's up for download (PSN: EddieQuinnzel) but Ill be sure to post up a a pic later.
 
Oh and I made a cool Chie. Still working on her Scarlet Tank racer though.

here's my finished Frank West from Dead Rising
 

Does anyone actually play this game? Or is it just a glorified mod engine?

I've enjoyed this game a lot more than I expected to.  Downloading the different mods like Mario and Iron Man really drew in my friends to mix and match all of the well-crafted creations like racing Space Ghost with a Ninja Turtles van. 
 
If there are any Chicago Bears fans out there, I published a Superfan themed set-up from the old SNL skits.   
You can find them under my PSN the_EDJ  
or by searching for Superfan for the mod and Superfan Supercar for the kart.  Thre's a lot of Chris Farley/Mike Ditka inspirations in both.  Let me know what you think!

 
 
also one of the assassin outfit-
 http://community.eu.playstation.com/t5/ModNation-Racers-Kart-Track-and/John-Marston-Deadly-Assassin-outfit/m-p/10851407

     THESE ARE NOT MINE tho.  So I'm not taking credit but I thought they should be known! "

"

See, I don't have this game, so fill me in. How do people get stuff like the exact same Giant Bomb and UPS logo and stuff on their carts!?

I didn't make this one, but I feel it had to be known. It is quite the work of art.
 

Cable / Nathan Summers (from New mutants / Marvel)