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