There are actually a lot of people working on something like this.... little juice boxes.
Here is my latest project which may be complete and operational by tomorrow. Then I have to pretty it back up again.

And here is the thread with more detail for anyone interested in creating one on their own made from parts bought at MadVapes:
http://www.e-cigarette-forum.com/forum/madvapes/71735-madvapes-nico-drip-mod.html