As it's been said before, if the government (especially the US government) wants you - they're going to get you. For the most part, even servers in third world nations (where it would be perfectly legal to host whatever you're hosting) would still buckle under the pressure of a US-3rd world standoff. Your best bet is proliferating your assets to multiple areas.

Actually The Pirate Bay had an interesting idea about this. They are planning on launching their servers high up into the atmosphere. An elegant solution imo.