Love the photo of the leaf! Lots of nice detail in it.
400D is a good camera, so don't worry about that. I personally think that the 400D shouldn't be targeted at the D80, it is kind of a middle ground between D40x and D80 which is perfect for begginers who don't want to grow out of a DSLR to quickly.
Keep on taking photos, those DSLR's arn't supposed to be gathering dust...which is a serious thing for them lol (I really didn't mean the dust thing to begin with ><)
Canon EOS 5DmkII + BG-E6 + Canon EOS 40D + BG-E2N + Canon EOS 33
Canon 17-40 F/4L
USM + Canon 24-70 F/2.8L
USM + Canon 28mm F/1.8 USM + Canon 70-200 F/2.8L
USM IS + Canon 85mm F/1.8 USM
Canon Speedlite 580EX II + Canon Speedlite 540EZ + 2 x Nikon SB-80DX
Cactus V2s Wireless Trigger - 5 x
Cactus V2s Wireless Reciever