I don't know if either this is a Amazon mistake or whether this is already commen knowledge or whatever but Amazon has Child of Eden for PS3 is listed as £14.99. 
http://www.amazon.co.uk/Child-Eden-Move-Compatible-PS3/dp/B004JLNKMG/ref=sr_1_25?m=A3P5ROKL5A1OLE&s=videogames&ie=UTF8&qid=1310579795&sr=1-25 

It's certainly possible, I suppose.

I'd love if it came out at a lower price on PS3. Really enjoyed what little I played on 360, but it definitely seemed a tad overpriced for what little (albeit really cool) content there was.

It's also £14.99 at Play.com, AND you get a pre-order bonus t-shirt.

http://www.play.com/Games/PlayStation3/4-/15606215/Child-Of-Eden/Product.html?searchtype=allproducts&searchsource=0&searchstring=child+of+eden&urlrefer=search

How much was the 360 version in £?

@Hizang: According to amazon.co.ukit looks like it launched at £39.99, and is now £29.99

you guys are all full of money being from europe

The pricing was confirmed to be €19.99 by Ubisoft. Definitely more interested to pick this up now (or in a couple of months...). A PSN release for REZ HD would also be nice.
 
http://www.next-gen.biz/news/child-eden-gets-ps3-release-date-lower-price-tag

It's still $50 here. But the 360 version has been $40 since a couple weeks ago.

It's also £14.99 at Play.com, AND you get a pre-order bonus t-shirt.

http://www.play.com/Games/PlayStation3/4-/15606215/Child-Of-Eden/Product.html?searchtype=allproducts&searchsource=0&searchstring=child+of+eden&urlrefer=search