I find this scary.
Should we not worry about Facebook because government will solve it?
10 years is a eon in internet time.
If the latter is actually what worries you, then there's nothing we can really do about that, nor should FB be forced into changing the way things are working out for them. There is a lot of value in a central hub. Email sucks for what FB is great for and decentralized hubs for FB-like communication will likely always suck unless there is great cooperation between disparate hubs and a great way to ensure there is a level of trust between data sources. Not likely to be developed in the near future. It's a difficult problem, but there may be some hope with the Semantic Web initiative and with linked data. Either way, you will most likely be signed up with one of those hubs and that will be your hub.
An equally serious problem is that Facebook makes no assurances whatsoever about whether they will choose to filter/censor communication (as they did here http://techcrunch.com/2010/11/22/facebook-censorship/). If I/a business want to be absolutely sure that any mail sent to me will get to me and never be deleted or censored, I can buy a domain and run my own email hosting; it's not a the whim of some external company.