Nah, betatesting is betatesting - it still has kinks in it. The ingenuity lies in getting people to find all the bugs without being paid, except though the feeling of exclusivity inherent in taking part in the Next Big Ting first - and that is a pretty common betatesting ploy. The only marketing they need is "OMFG, it's Google! And it's revolutionary!" Those two snippets alone will get half the planets tech geeks' interests peaked. What more could you need?