So, it is with some sadness I point you to the “Farewell Issue” of Endicott Studio’s Journal of Mythic Arts. I was honored to be asked for some poems for this final issue, and am going to mourn this journal – a combination of scholarly essays on fairy tales and mythic archetypes, smart fiction, and imaginitive poetry.
http://www.endicott-studio.com/jMA08Farewell/index.html

This is a frighteningly accurate portrayal of how difficult it is to sell poetry books, even for a hard-working poet (and thanks to Ron Silliman for the link:)
http://criticalmiscellany.wordpress.com/2008/08/15/selling-your-book/
But you may want to substitute “blogs” for discussion boards.
The two places where my experiences diverged with any signifigance from the one written about there were:
1. I was lucky enough to have my poems read by Garrison Keillor, on a national radio show, besides being on the local public radio show. Any national media attention is going to really help poetry book sales, so I am grateful to the people that make that happen on a regular basis.
2. My university reading experiences were almost uniformly much better than the one described in the essay, mainly due to the hard work of the faculty who asked me to come out in promoting my reading, more enthusiastic-than-usual poetry students, and probably the good will of said students for said faculty, who were all very well-liked. Due to that, I am much more likely to be excited by a chance to read and come talk at a university – I’ve had very good experiences so far!
But it is a reminder that no matter how hard we poets work, the sad fact is many more people want to buy fiction, non-fiction, and anything else rather than poetry books. Even our fellow poets.