Twingly Microblogging Search
When I teach my class on using Twitter in Business, I always spend a
fair amount of time on Twitter Search. After all, where else can you
watch comments on your brand in real time?
So I really like Twingly. Previously a blog search engine, they've expanded to microblogging.

Twingly searches Twitter, but it also searches other microblogging
sites, including Jaiku, Identi.ca, the Pownce archives, and
microblogging options I haven't even heard of.
I like being able to aggregate the information from all the sites.
However, my only complaint is that the results are not real-time
updates, as in Search.Twitter.com. It functions more like a Google for microblogging, but that's not always a bad thing.
(re-posted from bub.blicio.us)