For cheap mounts:
http://www.factorydirectcellular.com...orola/e815.htm
"A/C Vent Phone Holder"
"Magnetic Mount Phone or PDA Holder"
"Dash L-Mount Phone Holder"
I have the dash l-mount phone holder and it works quite well with my sena case on my x30. We also have a couple magnetic mounts on our phones. A magnet sticks to the dash wherever you want and then a little metal oval (you get two of those) sticks onto the back of your phone. I have an e815 and it still fits in the belt clip. I'd imagine it's strong enough for an axim, but I haven't tried it.
By the way I saw the thread "cheap axim car holder <$10" and that's what reminded me of this..