Here are few sites where you can find cool wallpapers & screensavers.

http://www.samonline.50megs.com/coolwalpapers.htm ( Walpapers made by me )

http://www.coolbuddy.com (Wallpapers,Screensavers & other stuffs)

http://www.digitalblasphemy.com (Wallpapers & screensavers)

http://www.visualparadox.com (3d wallpapers & screen savers)

http://www.dremagirlswallpaper.com (Wallpapers of female celebrities)

http://www.softseek.com Desktop themes, Screen savers & wallpapers)

http://www.galttech.com (Desk top themes & wallpapers)

http://www.tnpsc.com (Screen savers,wallpapers & other cool stuffs)

http://www.prinz-online.de (3d wallpapers)

http://www.webshots.com (Cool wallpapers)

http://www.indiafm.com (Wallpapers of Indian celebrities)

http://www.wallpapers.com (Tons of Wallpapers)

http://www.screensavers.com (Tons of Wallpapers)

http://www.bonazas.com/sssavers (Download screen savers)

http://www.desiboyzmasala.com (Wallpapers, pictures,fun stuffs etc)

I will add more sites soon...