Unless it’s an elaborately constructed hoax (like all Twitter posts should be assumed to be until proven 100% true with DNA), Max Bemis has posted a rather long update about the future of Say Anything on his Twitlonger account.
You can read the statement in the replies or visit http://www.twitter.com/maxbemis for the skinny.
Spoilers: Leaving RCA and not going on hiatus.