UPDATE: On a lazy Sunday, I got one request per hour to join the Yahoo Group for Irishblogs even though I sent no invitations. I think this group has legs.
YAHOO -- I like the new look in Yahoo! groups--it's better streamlining of content--but several other reasons bear mentioning because a cluster like Irishblogs might have a sustainable group dynamic if it was a Yahoo group for Irishblogs.
Easier to share stuff. You can see messages, photos and files in one view. Dave Winer doesn't like that it changes a familiar interface.
Vitality Alerts. Yahoo added vitality alerts for recent activity on the Yahoo! Groups home page, the My Groups page, and the main page of every group. Now it's easy to track when a new message or photo is posted to one of my groups.
Group Photos are part of the Yahoo! Groups home page. Winer thinks the space alloted is too big. I think the placeholder fits the standard button image from Flickr.
Message Previews give me snapshots instead of all the clip-on dribblings that come with verbose IE-rant musings.
Search by nic. I can find Yahoo! members by ID or alias. I don't have to know the email addresses.
There's also a colour scheme that moderators can use. If the mod knows layouts, text can be easier to view.
Yahoo! -- New look for Yahoo! Groups