We've enhanced the /share command to use Embedly for generating titles and descriptions of shared links. For example, this means that tweet text is now rendered inline, saving you a click. For YouTube links to get the video description, saving you from possible rickrolls.
Rooms now also have a share bookmarklet, you can find it in the "Helpful links" section of the web interface.
Finally, the share command can also be hooked up to Google Reader's Send to feature. Just go to the settings page and add a custom link with this template:
