My number one gripe with both Twitter and Facebook - services I love - has been that - fuck it - I can't even search through all of my own tweets, I can't even search through my own Facebook wall.
Looks like they both needed an outside party to come along and take care of the problem. Daniel Gross, you are a billionaire for doing this.
Greplin
Greplin: The First Y Combinator Company To Get Me Excited