rthstewart will host the 3 Sentence Ficathon in February at her journal. Not femslash specific, per se, but the prompts are great. Many are open ended: any canon, any pairing. Additionally, the 3 sentence focus (with a very loose definition of what constitutes a sentence; it's fine if you go over) gives folks a chance to write with a very low barrier to entry.

I've got my own female centric (but not femslash alas) project under way. It's a bit of a monster, but I hope to drop in to one or more of these with some drabbles! I would love to be able to knock out some short short ficlets in Feb.