Actually, ever since I found out about the Poetry Espresso list from Cassie I've been a big admirer of it. It's sort of what I imagined the Poetics list might have been like back in the day, before all the grandstanding and core-dumping, though it probably wasn't. Espresso seems to have a scale that's compatible with a real community, but in a supportive and not exclusionary way--heck, I actually see folks posting poems there and asking for suggestions and then actually getting them and then incorporating them into the poem. Plus it's had impressive longevity.