I've been checking in on the Ace sites to see what I can find and have been regularly running my AceUpdater for Mac to keep myself current. Here is the current verdict (as of 1:45pm EST)
- WoW Ace Wiki: unresponsive
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WoW Ace Files: page loads but addons are up and down
- WoW Ace Updater page: unresponsive
- Ace Updater: Works sporadically, but normally showing no installed or available addons
For now, you could check out the WoW Interface 2.4 Survival Guide, which can provide alternate links to some of your Ace addons, and others, that may be a closer incarnation fo the 2.4 version of a given addon.
Until then, you could always Go Commando!
Looks like Curse and WoW UI are down. You can try the ultra-low bandwidth version of Wow Interface, which appears to be up and running still.