I'm using poolmining.org as an alternate - they have a very nice site, and seem remarkably stable.  Min payout is 0.1 DASH though, so it can take over a week to accrue enough.

Coinmine.pl also seems decent and has a 0.01 DASH min payout, but coinmine.pl also has a 0.001 withdrawal fee, so it makes more sense to accrue some before withdrawing to save on fees :/