the latest version of nextBLAST is really cool. another better bloglines than bloglines.
It is both a combo Desktop aggregator and wireless aggregator via WAP SMS or WAP Push. A great execution on RSS-as-alerts. This was one of the ideas we had when we were pondering what turned into FeedBurner - which is of course a bit of a different direction.
Some of these things cost Flooz, but that's okay. Flooz was an idea before its time.
Of course, to do some of these things, you need an SMS verification...and i've been waiting for mine for a good hour now. I'd blame Cingular for this before i'd blame them, though.