Sure, there are plenty of other good ones and some not-so-good. There are several on www.contesting.com
(look at the bottom of its left menu area) - and no, not all of them have to do with contesting. ;-) Towertalk and amps are VERY active. BTW, there's a link to contesting.com in eHam's left menu area - click "Contesting".
Also, mailman.qth.net has quite a few active ones (the Kenwood and 1000MP reflectors there are great) and quite a few dead ones - gotta look around.
Do yourself (and other list members) a favor and browse their archives before subscribing to any of these and asking questions. First, you'll get a feel for the list, is it busy or dead, and who the list gurus are, etc. Second, you might find the answer to your question already posted. Little is more frustrating to existing list subscribers than to see a newbie arrive with a question that was answered last week.