Weeeell, I have it now and took some photos I will upload soon (this laptop is incredibly slow). I only tried it for a day and half and it looks very good :) :)
I knew it was good and was a little worried about the Sigma 18-200 but its autofocus is really fast :) The only downside is its noise when it focuses. It is pretty loud which is a pity because the camera is silent when taking photos. The Nikon D70 is louder.
More tests tomorrow :D
As I like almost everything about the 350D, I will just list the things I dislike (the list is short):
1) It is a little too small for my hands.
2) The quality of the plastic is not great. It is "light", attracts dust, and can be scratched easily. It reminds me the plastic of a Tic Tac.
3) The LCD is not easy to read in the sun.

Olly

Congratulations !!! :D
Regarding LCD,i can't read it in the sun too,maybe it's a Canon thing :)
Are you able to see the LCD of the Nikon in the sun?

I have trouble with Canon LCD in the sun (and it's almost always sunny here!). I'm curious as to whether it's a Canon thing too.

With the Nikon D70 it is easier, and I believe with the Canon Pro90 too. With the 350D the screen isn't bright enough and I have trouble reading the setting per example. It is like a mirror, I see myself :)
I also miss the little transparent plastic the D70 has to protect the lcd screen from scratches.

The noise is very low even with high ISO. I am almost always in 400 or 800 ISO. LOL That's great. I need to see on a real screen when I am in London as for the moment I am seeing only on a laptop screen.

I just uploaded two photos:
http://www.megapixelworld.com/photography/showphoto.php?photo=914
http://www.megapixelworld.com/photography/showphoto.php?photo=915
Resizing 8 megapixels pics is impressing, even if the difference between 8 and 6 megapixels isn't that big as it appears.

Your photos are very clear and sharpen.what ISO did you use at these?When it's a sunny day i have never increased the ISO more than 100

They were taken at 200 ISO but even at 800 ISO it is very clean. I will post more photos at high ISO :)