The Liqua-Vade is actually utilizing buccal and sublingual delivery since its being consumed as pre-emuslified formula.
You are right about the tween, HPMC and PEG... we actually utilize variants of those compounds in our Liqua-Vade formula to enhance delivery, and Ive explained the mechanism in this thread here -
http://anabolicminds.com/forum/supplements/137728-future-nutrient-delivery.html
And more indepth in this interview
here
And you can see how the delivery system works based off the visual schematic here
BTW, the study that examined oral resveratrol absorption in humans
(Walle et al, 2004) disolved the oral dose of resveratrol into ethanol, DMSO and glucose water. Its not exactly fair to say that the same absorption would be achieved with a compressed tablet or capsule of resveratrol. (remember, nutrients need to be molecularly dispersed to absorb through epithelial membranes)
Plus, 7,8-benzoflavone (being more lipophilic than resveratrol) is going to have a harder time dissolving and absorbing through the GI. Liqua-Vade probably shows the most benefit with this ingredient compared to a capsule or tablet.
-Eric