Good news for those of you on LinkedIn who have found your way into the TechRepublican group, Link'd Republicans: On Friday, the uber-popular professional social network will be expanding its groups feature with several new items:

* Discussion forums: Simple discussion spaces for you and your members. (You can turn discussions off in your management control panel if you like.)
* Enhanced roster: Searchable list of group members.
* Digest emails: Daily or weekly digests of new discussion topics which your members may choose to receive. (We will be turning digests on for all current group members soon, and prompting them to set to their own preference.)
* Group home page: A private space for your members on LinkedIn.

Is it just me or is LinkedIn continuing to innovate to become one of the most relevant utilities on the web?