You know how Google self-effacingly claims that some of its cleverest, most useful services are betas or lab experiments? Google Squared is not one of those readier-for-prime-time-than-Google-suggests items. The service–which was demoed a few weeks ago at a Google press event and which went live today at Google Labs–really is experimental. The way it returns search results as a spreadsheet-like grid is wildly inventive. But so far, the most impressive thing about it is that it sort of works, not that it’s terribly useful.