Now, in addition to:

fertile ground poetry project

. . . We will offer (and beg for your participation in):

lively conversation on poetry and the lives of real live poets (like you and us)

engaging challenges to develop your skills and keep you moving

cool poetry tips and games

poetry stunts and other acts of insanity

free writes (let it all hang out)

all of this fun will be unstructured and according to no particular
schedule. we’re lying in the grass here. it’s hard to be rigid.

[because we are serious poets, there is also an optional critique
component, which is, of course, more structured than the rest of the
site. but even that will be fun.]

and:

Totally Optional Prompts

Totally Optional Prompts is a community of people who gather to share poetry. We provide weekly prompts which are Totally Optional, read each other’s offerings, and generally have a good time.

we have — or will have soon:

read write poem

Read Write Poem is an online gathering place for those who love
poetry — and for those who suspect that, with a little nurturing, they
could grow to love poetry.

All that’s required to participate is an Internet connection, gobs
of love for the P word, an interest in collaborative poetry, and
respect for and generosity toward your fellow participants.

… another new and classy poetry site. This is a ‘sister site’ to fertile ground. There is already a read. write. poem. group at NaBloPoMo, with several rich and active discussions.

And there is also:

Haiku: One Deep Breath

One
Deep Breath is a community of poets writing and sharing haiku, tanka,
and/or haibun. Each week we will offer up a new prompt which we hope
will inspire your writing.

. . . which I have seen, and linked, before; but somehow lost track of.

So go. Write.

(Says she to herself…)