Check out F1000 Posters, an open access poster repository, that provides a permanent, structured environment for the deposition of posters as well as a trustworthy venue for ongoing discussion and development of the information being presented.
The early scientific information presented in conference posters can be an important resource but, unfortunately, it is almost always completely lost once a conference is over. As a result, posters are only viewed by a handful of people before they disappear, either forever or until the research is later published as a paper. Often important work never gets published, particularly if it focuses on negative results or case studies.
Researchers are invited to deposit their posters in F1000 Posters to widely disseminate their new research and obtain feedback from other scientists. Initial responses from some of the leading publishers and journal editors has been supportive and many have confirmed that they would not regard deposition of a poster in the repository as prior publication (see full details of the responses obtained so far).