dw_allsorts is still live and kicking, however - we have recently added a bunch of new prompt tables and added 'themes' to widen your options for claims. Doctor Who Allsorts is a mini prompt table challenge comm with bite-sized tables (in sets of 3, 6, 9, 12, 15, & 20) for all fanworks. You can claim a character, pairing, crossover, era (or spin-off) or theme from any part of the big rambling universe that is our fandom. Sign-ups are always open and you can drop and pick up claims as you need to.
See the comm for more details about how to take part, and you're welcome to sign up at whichever site suits you best.