A lite account would allow blockchain savvy people to have wallets outside of exchanges without a having a hive account with 4 keys. They could even start earning hive in our Dapps, since transfers are free.

Well that's where you can look into what 3speak is doing, they don't generate all three keys when creating an account, they manage everything on the account, and generate keys when the user asks for it to take as much complexity from the user as possible.

And they do it for free thanks to account tokens.

Resource credits would be provided by someone else, probably the Dapp.

Rc delegations are coming soon:tm: ;)