I'm sure you guys noticed that the second "P" looks different. I compared it to the "P" in "Pokémon" and it's not quite the same. It's slanted and has the top part extending past the side but it isn't as similar everywhere else. Though I suppose if it did have something to do with Pokémon, that would make it too obvious, that is, if it was meant to be an obvious tease, rather than just the patent office going, "oh, look at these."
I was also thinking "PC", what with DSes being able to communicate with PCs. Though Nintendo products tend to be in their own world (you pretty much have to go to third parties for DexDrives and USB Memory Cards) maybe they're going to take advantage of the fact that nearly everyone has a PC, so long as such devices are more beneficial to game play and don't open things up to piracy.
As mentioned, it DOES look like something they'd throw on many boxes as a logo of a feature. If it was a plain old game you'd expect that the letters would be more meaningful if you're just going to refer to it by that. People call games "SMB 3", "SSBM", "Pokémon R/S", but it's not like they're their official names or anything.
"V-Pocket"...now unlike "P", "C", or "G", the letter "V" doesn't exactly have a whole lot going for it. "Video" seems to be the obvious choice (which is also related to video gaming like the "P", "C", and "G" words I mentioned earlier). Visual? Visceral? Vivid? Unless it's a made-up word, sort of like "Viewtiful".
I guess we'll find out in May or at least this year.