What I foresee: Standardization of a Social Networking protocol. Like email, it will have a standard format of what basic functions is has to have, and your provider (Gmail/Yahoo, or in this case, Facebook/myspace) will have features that provide a front-end to the standard without violating it.
Ok, so it's not likely to happen AT ALL, but one can hope... I only have hope because if it does get standardized, there's likely to be security standards (e.g. settings for who sees your info).