A great all-purpose site for literary research is Literary Resources on the Web . There are lots of sites on the web where you can find song lyrics. TC's Song Lyric Archive is the best I've seen so far. Let me know about others you find. The definition of poetry has often been stretched to include many things.
Experimental poems are all the rage, but lots of things can be seen as poetry of a sort.
Great resources for finding interesting experiments in poetry are The Electronic Poetry Center , which has a wide variety of links, and the UCSD experimental poetry collection . There are found poems , concrete poems , and a whole variety of types . Dadaist experiments in making poetry can be fun. There are lots of people publishing poems on the web, or publishing other people's. Anyone who can set up a web page can publish their poems.