i'm looking at buying my first flash. I was wondering what would be a very versatile flash for outdoor, sports, and portrait type pictures. something not too expensive but versatile enough to handle all of those.
I've been very happy with the Canon 430EX Speedlight. I don't think any of the third party ETTL offerings are significantly less expensive, and I figured I wanted a flash that communicated as well as possible with the camera. You're probably a way's away from needing the advantages of the 580EX. As far as I remember, the main differences are that it has a longer range and can control "slave" flashes--which is irrelevant if you only own the one flash.
Sunpak 383. No E-TTL, but has auto exposure on camera, manual fractional output, sync port (you'd need a $10 sync shoe for your Rebel to do off-camera work), and is an all-around good flash. US$80.