Rothgar still posts on here from time to time, but he is the game's lead programmer so you can imagine his time to do that is probably quite limited, especially now around DoV. He never really posted that much here to start, if you really want to get in contact with him the official boards have a lot better chance of him seeing it.
Last I've heard Lua was still on that list of things they'd love to do but have to find time for. It's always been something they want to do but have no schedule for, so the fact is hasn't shown up should not be a surprise. Lua support is probably not going to be an easy thing for them to get done, both in terms of working it in with the existing game and in terms of SOE's desire to try to keep the UI somewhat more locked down.
I'd suggest giving him a PM on the official boards a bit after DoV goes live if you want to check in and see if Lua is still on the 'to do' list.
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