testnet3 is getting extremely long in the tooth; the difficulty is sky high and there's a lot of very large blocks that have bloated the chain up to 1.4GB. New syncs take a very long time due to runs of these large blocks.
Is it reasonable to push a new testnet version as part of 0.10? Possibly with better difficulty rules than testnet3, the "drop the difficulty for one block" decision seems to cause more problems than it solves.
