I need some comparison between PS3 Wii and XBOX360 ...

Wow, so many. I've found these 3 to be especially good:

well if your interested in the latest crazy Wii technology you would be wise to look here.

 We can now talk to our wii, not to mention have amazing fun with all the add ons. Its not graphically better than certain others but its cheaper and loads more fun, not to mention its making history with its developments.

heres the link to get a talking Wii

buy a wii 

The Consumer Reports Agency has done all of the research for you.  Here is their take on the subject:

Our initial take. The Sony PlayStation 3 is an excellent Blu-ray player with the potential to become a very good gaming console. But the PS3's limited selection of games makes the Microsoft Xbox 360 a better choice for hard-core gamers now. Everyone else should consider the Nintendo Wii, which is more affordable and (probably) more fun.

For the entire review, click the link below:

http://www.consumerreports.org/cro/electronics-computers/news-electronics-computers/december-2006/first-look-sony-playstation-3-and-nintendo-wii-12-06/overview/1206_playstation3_ov.htm?resultPageIndex=1&resultIndex=1&searchTerm=ps3,%20wii%20and%20xbox