I'm sure it will be available at midnight. Midnight in which part of the world, though, remains to be seen.
With a shorter support lifespan I wont bother with 13.04.
There are rumors that unity 7 will be backported to 12.04 so lets hope there is truth in those rumors.
True 13.04 has a shorter support span...however, 13.04 practically leaves 12.04 in the dust in terms of speed, stability, and various improvements...it's that good...and worth even the shorter support cycle...
It also "blows away" 12.10 as well
^ especially in xubuntu, 12.04 was a letdown for xubuntu imo, 12.10 made me happy and 13.04 is good, but it has a couple out of the box issues
Printers are no longer auto installed/configured, you have to do it manually, that was a cool feature that seems to now work anymore
the stock 3.8.0-19-generic has issues with nvidia (fails to boot from time to time, and lacks HDMI audio) the mainline kernel is good, as long as you can get the -19 to boot so you can install the mainline kernel [mainline kernel update checker/installer]