Will blog for a free t-shirt (size Large please).
This blog has been using Ligit Lijit since January, 2008. (Didn't realize that "Lijit" was misspelled in the 2008 post until noticing that a lot of other people searching for the service were also missing the trademark play on a—uh—legit word.) Lijit replaced Google Blog Search, which leaved a lot to be desired. Lijit is far easier to integrate into a blog for those like yours truly who lack the desire to mess with anything more complicated than copying and pasting snippets of code. It's a turn-key search solution for popular blog services such as TypePad, which still lacks a useful search engine of its own.
The "Popular Searches" cloud feature of the Lijit Wijit (get it?) is fascinating to watch. For a while, Gisele Bündchen was vying with Erica Hill—but strangely not Jessica Alba—for the most popular search term. Lijit has increased the number of searches performed on this blog so celebrities no longer dominate the queries, or perhaps this blog needs more gratuitous mentions of Scarlett Johansson, and Megan Fox... Anyhow, if you have a blog or website, make it better by adding Lijit search to it.

