[jjflash]

Here is some insight that you may find interesting. I recently read an article in a major poker magazine. Normally, I would reference the exact mag page number and an exact quote. I am having trouble locating the article so I am asking you to take my word for it. Anyway, it talks about the underground cardrooms in NY city. In the article it describes people playing $5-10 NL Holdem and buying in for $10,000! The author explains that the poker pros bread in this environment (Lederer, Ungar, Seidel, Harrington, etc.) learned to play deep stack poker. This is the way that the game was meant to be played. The ONLY reason that the casinos have caps on buy-ins at NL games is so that the bad players won't lose all of their money in one session and will come back.
In light of the casinos thoughts on this, a cap may be in order, but I agree that $100 is far too low. The rebuy is also rediculous.
I play a regular low limit game where I buy-in for more than anyone else. I used to catch some flack for this until I pointed out that the players had more to gain from me being there than I did from them being there (though this is not 100% true).
I think that in a $2-5 game $100 should be a minimum buy-in (if you have a minimum) and the cap (again, if you have one) should be between $500 and $1000. Most people that would play a $2-5 game should have no problem with these numbers.
On the other hand if the game is as lucrative for you as you say it is, maybe you shouldn't "tap the aquarium".
I am not sure if this helped at all. If it did then I am glad. If it did not then good luck finding what you are looking for.