Update July 4 2009: I have released version 1.1 of my ShareThis plugin. Read the [url=http://cronicaslinuxeras.com/extension-sharethis-1-1-b2evolution#p2320-english]Announcement[/url] (o, en [url=http://cronicaslinuxeras.com/extension-sharethis-1-1-b2evolution]español[/url]). Many thanks to NelsonGuirado, who provided several suggestions and helped with testing the functionality.
I'm happy to present the Sharethis plugin for b2evolution 2.4.x.
What is sharethis? A nice button to allow your readers to post your content to multiple social bookmarking sites, like facebook, digg, meneame, etc. Furthermore you'll have upon registration on sharethis, nice statistics about click-through rates and other goodies.
This plugin will add a Sharethis button to your posts. Just that.
Read more and download at [url=http://cronicaslinuxeras.com/extension-sharethis-b2evolution]Crónicas Linuxeras[/url] (in spanish, but instruction for installation are standard, or so one hopes. Maybe later I'll add an English translation).
This a snapshot of the backoffice configuration screen for the plugin: