Obviously, it's a VI style bass using Schecter's Ultra III design, and its FG-101 humbuckers and controls at a 30" scale length, tuned E-e (From the E of a standard bass to the second octave of a standard guitar... or, 1 octave below standard guitar). The body is mahogany with a set mahogany neck. The bridge and hardtail are TOM style, like on the Hellcat VI.
Initially the Ultra VI was going to come with 250k pots, like the Ultra III and the Hellcat VI, and .022uF cap., but with input from some people on the Schecter Hellcat VI & Ultra VI Players Facebook group, Schecter's made some changes that will improve the tone over that of the Hellcat VI, such as switching to 500k pots and .047uF cap for a brighter tone with more high end and clarity. Additionally, a .002 Treble bleed cap has been added to the volume pot to maintain tone at low volume.
Apparently Schecter, after applying these mods responded saying "We have tested this out and it sounds great."
The guys from the facebook group apparently also suggested a push/pull strangle switch as well, a la the Fender VI, but I don't think Schecter's responded to that request yet.
Schecter says that the Ultra VI won't be available until the spring 2011, at least.
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Someone who got their hands on one of the Ultra VI prototypes informs us that the LaBella Hellcat VI strings do, indeed, fit the Ultra VI just fine too. Schecter has told us as well that GHS (IIRC) has also agreed to make strings for their VI style instruments as well. There shouldn't be much of an issue getting strings for these.