Patch 3.5 Tomorrow - Server Maintenance
On 3/28/13, starting at 00:30 PDT, ranked queues will be disabled in preparation for patch 3.50. At 2:00 PDT, the servers will be shut down and all games currently in progress will end in a draw and stats will not be recorded. We estimate the battlegrounds will be unavailable for 6 hours.
I noticed this link early today, and figured we would be seeing a patch soon (and it looks like it indeed is the case!) Over on the LoL Site Riot will que up articles and have them ready to go but "disabled" to the public. However, early today the news link "http://na.leagueoflegends.com/news/zac-secret-weapon-now-available" triggered. Note this article is still hidden to the public. But it looks like we should see Zac within a short time after this patch goes live (We usually see the new champ the day or two days after)