how many GPIO pins?

I'm looking for boards to help me out for a large LED strip controller
project, and the BeagleBoard and the new BeagleBone seem very
interesting.

One thing I'd like to know, that I can't seem to find information on,
is how many GPIO pins are available, assuming no additional devices
are attached. I'm guessing this information is not straightforward or
else it would be documented better.

Can anyone help me out?

BeagleBone has 66 GPIO possible. None of which can drive an LED direct…
Beagle-xM has 21 possible. None of which can drive a LED direct.

You will need buffers to drive a bunch of LEDs.

Gerald