There's been an update to the recommended version of Infinity, so I'll be working on an update, since there's also updates out for Reika's stuff, too. I might add a thing or two (that don't add any worldgen, don't want to have to deal with the bad things that retrogen can cause) while I'm at it. The server will stay up til I'm done, and this will likely take me the rest of the week. At the latest, it'll be up and available sometime this coming Tuesday. Might consider making a simple installer for the addon pack, if I get the time...
[ETA]
Took me less time than I originally thought. Kept the old configs, thankfully, so there aren't any ID collisions I need to work out; that takes up most of my time. I've tacked on Project E to give a use for all the garbage you'll no doubt end up accumulating during your adventure, turning it into something halfway useful. It is, however, gated behind wither-killing, to keep it from being too early game.
[ETA2]
Server updated and starting normally, I'll have the new addon pack available shortly. Addon pack has been uploaded (instructions and all) and is available in the OP!