has a video output, it's not a VGA connection, but one that takes an adapter that can have DVI or VGA on the end.
"Mini DisplayPort output port with support for DVI, VGA, and dual-link DVI (adapters sold separately). 27-inch models also support input from external DisplayPort sources (adapters sold separately).
Support for extended desktop and video mirroring modes
Simultaneously supports full native resolution on the built-in display and up to a 30-inch display (2560 by 1600 pixels) on an external display
Check out the 27", gotta get it, here:
On the subject of the Glossy screen, under bright lights you will see some glare and reflection but, with controlled lighting and an image on the screen, the reflection is not that noticeable.
Personally, I don't have a problem with the glossy screen on my iMac.
Best place to check for the Wacom ciniq support would be Wacom themselves, but, because I'm a good egg, I took a look and it appears as though all the Cintiq tablets have OS X 10.6 drivers ready for download. Check out their driver download page here: