I very much doubt a usable server build would be out yet, within the next few weeks I'm assuming, we haven't really talked about what's happening with 1.8.
We don't have to reset anything for it really, since temples will generate in unexplored oceans, and I think the same 'may' also work for the new cobblestones, though they are craftable, which is nice.
The only thing which might break is double flower top-halves.
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At present time with the server, it appears to have wiped mcmmo stats due to the lack of space, I think this is due to with how it stores the data (terribly).