I think you're in the wrong Forum Gman...Micro-T comes with 27MHz AM Radio. You might be thinking of the new Kyosho dNaNo?
Though, with the Micro-T people have swapped out the innards in favor of their own electronics and quite a few people have opted for using the Spektrum 2.4GHz DSM instead (I plan on doing this as well, I've got all the parts and just need to swap in).
The 2.4GHz systems use their own system...No more dealing with AM/FM/Crystals. You can read more about it at Spektrums website page here:
http://www.spektrumrc.com/DSM/Technology/spekTech.aspx
Other manufacturers are now offering their own 2.4GHz products as well, like Futaba's FASST system:
http://2.4gigahertz.com/
...The new Kyosho dNaNo 1/43rd cars have 2.4GHz stock!