If you've tried activitystream_identicagroup module for Drupal, but still don't love the display, here's what I did for Frog and Owl: I installed and enabled activitystream_identicagroup module, then edited one user's settings to add frogandowl group to their activitystream. Note please that the identica field (if enabled) and identica group field are totally different things -- identica group is toward the bottom of the form. Then, I created a view for what I thought was a nicer-looking identicagroup block.

I've attached an export of the view to this post, you can import it by opening the file and copy/pasting its contents to http://example.com/admin/build/views/import (replace example.com with your Drupal site's URI), then saving. By default the view's name is nice_identica_group, but you can change that when you import it if you'd like to.

You'll probably have to edit some things in this view to get it to do what you want:

• My identica group stream is owned by user 1. Yours may be owned by a different user. When you edit the view, look under "Filters" and click "Node: User posted or commented" to change which user the view should get its stream from.
• I set the footer of my view to include a link to the frogandowl identi.ca group in case someone would like to join on identi.ca. You should look under "Basic Settings" and click "Filtered HTML" next to "Footer" to change or remove that link.

Don't forget to save, and of course feel free to edit anything else you like. :) When time permits, I plan to submit some changes to activitystream and activitystream_indenticagroup that will make most of this legwork unnecessary, but for now at least it works, :)