OpsTube

Students in high school, or college kids without embedded math knowledge, take note: Microsoft’s Live Search can solve math equations with variables. More »

Windows only: You can get amazing deals on Craigslist, but you won’t save any cash if you can’t find the bargains. CraigsList Reader lets you deep-search multiple Craigslist location to find the loot. More »

Pipl Tracks Down Your Online Love By Email, Username, or Phone Number people search engine Pipl has updated once again, this time offering three new reverse lookups based on email, username, and phone number. Finally you can find out more about your online crush, superdelegate420. More »

Google Preferred Sites Customize Search Results with More of What You Like: Google has released a new experimental search feature—called preferred sites—that returns customized search results based on a list of sites you like. So, for example, setting Lifehacker as a preferred site at your Google preference page will increase the likelihood that a Lifehacker post will appear in the first page of search results when you search for something. According to Google Operating System, the feature isn’t available to all users (including this editor). If your account is one of the lucky ones, let’s hear how the feature works for you in the comments.

It’s very similar to (and inspired by) the previously mentioned, just-the-pics-ma’am Flickr searcher Compfight. Once you’ve searched, the results can be sorted by relevance, views, user ratings, or date published. It looks like you only get one page of results, so if the clip is buried deep inside YouTube, only search term refinement will dig it up here.

All told, it looks like a powerful and quick way to gun through YouTube videos to find what you’re looking for.