Poetry.com is a SCAM so don't use it. They'll make you buy the books you contribute to...
www.fictionpress.com is a good place. They copyright your work on the page and give your poetry permanent links. Other users and writers are able to comment on your work and give you feedback. Mine is at http://www.fictionpress.com/u/613401/Amanda_M_Lynn for the list of them. If you set up a page and post things, message me through here and I'll go read your work and review.
