No, the Custap berry is not released yet, and I'm pretty sure none of the other pinch berries are either. I'm not aware of any comprehensive list of released berries for generation V.
Out of Dream World we currently have:
All 17 type reducing berries
(Pleasant Forest)
Cheri, Pecha, Oran, Sitrus, Figy
(Windswept Sky)
Aspear, Persim, Aguav, Iapapa, Pomeg, Kelpsy, Qualot, Hondew, Grepa, Tamato (eg all the EV reducers)
(Sparkling Sea)
Chesto, Rawst, Wiki, Mago
(Spooky Manor)
Lum, Razz, Bluk, Nanab
(Rugged Mountain)
Wepear, Pinap, Cornn, Mago
In-game, I think you can get most of the common ones out of Rangers and misc NPCs around Unova. Notably, you can only get Leppa berries in-game through some guy in Lacunosa on Sundays, 2 rangers, and wild Pokemon.
Likewise I
think all the type berries can be found on Wild Pokemon, too.
Also you can get a Starf & Lansat berry for getting really higher Battle Subway streaks (105 and 203 respectively).
I think a Darkrai was given away in Japan that held an Enigma berry:
http://bulbanews.bulbagarden.net/wiki/Darkrai_to_be_distributed_in_Japan
So I think this means that the only ones you can't have right now are:
Rabuta, Nomel, Spelon, Pamtre, Watmel, Durin, Belue
Leichi, Ganlon, Salac, Petaya, Apicot
Micle, Custap, Jaboca, and Rowap