If you're uploading to websites, you might want to think about converting a bunch of different bitrates ahead of time. For instance, convert everything at 96, 128, 192 and 320. Guaranteed that a site will require one of them at it's best to have them done ahead of time rather than on the spot.
Personally I can't stand anything below 192 but some websites insist on it.

You should also add ID3 tag info so that people know who's song it is and your copyright information is embedded with the file.
Also, use a set format for your file names like: Bandname_songname.mp3