This page displays the number of entries (articles) in PubMed (Medline) published every year, that conform to search strategy (such as a phrase) you enter.
"For adoption of new technologies in science, it has to be an order of magnitude more useful than current tools. We just don’t have the time to waste learning new tools that only marginally increase our productivity." Discussion: http://friendfeed.com/science-2-0/bceaea67/scientists-still-not-joining-social-networks
EndnoteWeb, RefWorks, Connotea, CiteULike, Zotero, Mendeley. Nice summary of the state of the art by Martin Fenner. Conclusion - not much to choose in some ways - personal preference!
Wouldn't it be great if we could just pull a formatted list of our own publications from CiteULike and fend off the timewasters? Well you can, using CiteULike. Seach your library for: +author:("cann a") +year:2008