Toast does it too. Select DVD as the output, drag avi files to the window, it will recode and burn them out to DVD, but the recoding takes quiet a long time, especially on old machines.
For a one-time-use, though, it's faster. Pop the file in, open iDVD, and burn. If you're doing a ton of conversions, you could justify the extra time for download, setup, and understanding of a different program.