It's mainly US based, but has options for Germany, Austria, Switzerland and the UK. When you run a search you have an opportunity to 'claim your name' - or at least the name you're searching for, which is good for ego searchers. The default search results are 'All' but it's possible, using a tab based system to limit to Private, Business, News, Other web pages, or Comments. Results can be sorted by date or relevance.
Search results are pulled from places such as Wikipedia, Amazon - both wish lists and publications, LinkedIn, NamesDatabase, MySpace, Friendster, Jigsaw, Vox, jobster, IMDb, Google news and blogsearch, Bloglines, Find a grave and web results. It will also try and find images for you as well. There's a nice refine feature in case you're getting too many results or there are too many people with the same name.
Two nice features are that if they can't find the person you're interested in they'll do a detailed search and send the results by email. This looks like a free service. They also have the 'search agent' which notifies you of new search results for the name of choice within 24 hours and then a weekly notification.
All told - I liked it. Easy to use, worked well, nice functionality. Worth a look!