From what I understand, Lavabit ran into problems because they wanted to fight some fight with the US government. In the service that I'm planning to build, I will just give up whatever information a legal entity wants when they ask for it in a legal way. The idea is, if your emails are all encrypted, you should have no problem with me giving people encrypted copies.
The above doesn't sound very smart, so I figure others should have thought of it already, so I must be missing out on something. What should I be afraid of?
PS: I don't want to be exposed yet, so wanted to use a throwaway account, but a new account would need to wait a while (I'm not sure how long) before it can submit. Guessing that there is nothing bad in just discussing this, I'm going ahead and submit it under my real account.