"Sure. Planar touchstones are places of power where magic is concentrated. Players who pick the planar touchstone feat can journey to these places, defeat some monsters, perform some arduous task, and gain access to new powers. These powers are usually of short duration or have "charges", so that you have to return to the touchstone to recharge the power.
There is a web enhancement for the Planar Handbook that should give you an idea of what they are, here:
http://www.wizards.com/default.asp?x=dnd/we/20040730a/scentsy"
Thanks for the link! I appreciate it!
Glancing over this thread makes me reminiscent of all the cool people that don't post here anymore.
Pants of the North!