Spanning March 13-16, Fader Fort is free and open to general public (provided you're 21 & up), but an RSVP is required. That RSVP gets you a wristband, which gets you in the door. SXSW badge holders will need to RSVP, as well, but they'll get priority entry to the Fort, where the likes of Delorean, Future, and Disclosure will be playing. (Those are just the teaser bands; the full lineup hasn't been announced yet.) Know this: The RSVP could very well fill before you finish reading this sentence, so move fast, friends. Update: No official word yet from Fader on the list being closed, but if you're like us, attempts to RSVP just lead to endless grinding (not the good kind).
Update #2: Overwhelming response crashed the system; Fader's taking the RSVP link down for a bit and will repost soon.
Update #3: RSVP for the Fader Fort is now closed.
But wait, there's more! SXSW Music wristband-sporters will enjoy "expedited entry" at a whole mess of other sponsored parties. For instance...