foobar will write metadata... load the songs as if you're playing them and then right click and select properties. You can then add the common tags to this interface. Artist, Album and Title should all be supported by iPod, WinAmp, Foobar, etc. You can also update multiple files at once so you can update the Album and Artist for all tracks of a show at once and then and do the titles individually. Note that this will only work on Flac, MP3 and other file formats that support meta data (not SHN, and not WAV).
There's probably plenty of other tools, but this has worked great for me.