If you just have the phone to play around with it, then yes, you should root it and have fun with it. You won't find a bunch of ROMs to flash, but you could use it to give Cyanogenmod a try.
Unrevoked has a MAC version, and after you root, everything is just drag and drop. I don't think you have to do the prep work for Unrevoked on MAC that you do on Windows (installing HBOOT drivers), but I'm not sure. Here's a link at XDA: [GUIDE] One Click How to Root the Aria with Unrevoked 3.21 - xda-developers