That reminds me of the early days of Flickr, which was very visibly in beta for years (it was on the logo). That gave me an appropriate level of anxiety about the longevity of the service. (Well, that and the fact that all the page urls still had a .gne extension, suggesting that Flickr was perhaps not their end game.) Then they went into 'gamma'!? for another couple of years before it finally became just Flickr.