Not on the Touch/PW. (I in fact disabled that whole panel in the Collections Plugin on those devices).
There was one way to do it on the Touch on vanilla devices (cf. some posts by eureka in the K5 Fonts Hack thread), but it wasn't particularly pretty/user-friendly, and I'm not sure it's doable anymore on the PW.
TL;DR: Not until someone ports a Fonts hack. (And it's somewhat low on the TODO list of most of us right now

).