When will Cyclone V be available?

The exact date is depending on the device, They are will be rolling them out over some time.

for the 5 series, Altera started with the Stratix V, and are moving down (Arria, then Cyclone) so general availability of all cyclone V is still a ways off.

Your best bet if you want to be an early adopter, is contact your support person and try to get some early ES devices. This would allow you to get some early prototype work done..

Pete