To the poster above, I don't think the Curve is capable of video capture, but it is capable of video playback.
Nonetheless, to the original poster, I'm glad you made the change. I was a previous Sidekick 3 owner. Once I upgraded to the Curve I felt I could do more with it than the Sidekick 3. Other than the usual internet browsing and IM's, I feel the Curve is more versatile as you can add more to it than the Sidekick.
Enjoy! I definitely am enjoying my Curve.