I am using a Sigma 18-125 mm lens. I have the original lens that came with it also and I have the 50 1.8 on order, that's about all I have the cash for right now! I would love to have the 70-200 IS, but it's so expensive, I am going to have to convince DH that this is more than a phase and that I won't be shopping for a pocket sized point and shoot in a month.
I did do a lot of research before I bought this camera, I knew I wanted a canon, but deciding which one was tough! I have wanted an SLR for YEARS, but have always been seduced by the convenient size of the little point and shoots, but this time I knew that I wanted a better camera.
We spent about three months researching what we wanted. I knew almost immediately I wanted the Rebel, but DH was not convinced. His fear was that the camera would be too bulky and I would not want to lug it around.
I spent a lot of time talking to salespeople and friends and family and reading on this forum and got the ammunition I needed. When it came right down to it, it was between the new canon IS3 and the Rebel, the price difference was not significant enough to justify not getting my dream camera, so we did!
I read up about the lenses on here and different other websites before deciding which "extra" lenses to get. My next purchase will be a tri-pod (hopefully they have taken all the Mother's Day is coming hints I have dropped and I will get one next weekend

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Anything else I need to shop for?