Get a good prime lens. The 50mm f/1.8 is superb and good value too but I find it a little to far on my 350D (50mm = 80mm iirc so you tend to find that although the large apeture makes it great for low light, you often find yourself a little too close to things indoors)
EDIT - Beaten by rasclart!!
I want Canon EF 35mm f/1.4L USM. nifty fifty cannot be ignored for the price and the sharpness of the pictures it takes though.
Dan, CS Admin. PMSL!
Yeah, the kit lens seems great value, it's just that i've heard crap things about it on the Canon. I had an old Canon SLR but sold it with a few other lenses... so i have experience of some better stuff.
In that case then what other must haves should i get lens wise?