Thanks.
Ah, I hardly made anything at wallpaper size because my B5 tablet is too small to paint anything big/serious, and uh, I suck at doing backgrounds. XD
I think
this Kingdom Hearts 2 fanart is my only work that is wallpaper sized(1024*768), it is one of my first few attempts to cg though, so it is quite crappy.
There is also
this and
this that can be cropped to that size, but they have blank backgrounds, they are old, sketchy and plain ugly. ;p