New in Shareaholic for Firefox v1.9:

1. New destination services:

  * Su.pr - stumbleupon's new url shortening service
  * Mozillaca – microblog for the Mozilla community
  * Hub.tm – url shortener by inbound marketing company HubSpot
  * Followup.cc – reminder service
  * TBuzz – a nifty Twitter link submission tool

2. New feature: Shareaholic Buzz Monitor (Realtime trending topics and hot links from: Twitter, OneRiot, Buzzster)
3. Updates to BzzAgent, Techmeme Tip submit code
4. Added support for Songbird 1.2
5. Misc. performance tweaks and updates, including improved namespacing

http://blog.shareaholic.com/2009/06/04/shareaholic-v18-for-firefox-is-here-adds-support-for-over-20-additional-services/