It's already out for Maemo.. they just started focusing more on android recently (January)
if you download the desktop version of fennec (there is one, it acts just like it would on your phone), it's really cool. I forgot where I found it, I googled fennec beta or something.
"The development of the Android version poses a bit of a challenge as Firefox Mobile is based upon C and C++, while Android is Java-based and the Native Development kit which is necessary to bring Firefox Mobile to Android was only released last October."