Yes, I've been wanting to do this for a long time, but fearing the time committment--but I've decided to take the plunge and JOIN CRITTERS!
What is Critters? Well, I'm glad you asked!
Critters is an online writers' workshop for writers of science fiction, fantasy, and horror. They have hundreds (or perhaps thousands) or members, and they send out about 30 manuscripts each week (on a schedule of Wednesday to Wednesday.) You're supposed to aim for doing one critique each week, and you can only have your own work critiqued if you have a 75% participation ratio (three critiques in four weeks.)
I've been doing a pretty good job of budgeting my time lately, and I've developed a bit of a backlog of stories I want critiques/opinions on--and I know that I ought to get a wider audience than just my husband and parents (who are themselves busy.) So I decided it was time. I figure I ought to be able to make the time to read and critique a short story each week, and this will be one more motivation to keep myself in the game.