Texas Hold em poker game counter?

I'm looking for a computer or iPhone app that allows me to play this game with my friends without chips.

It should be like
-John: CALL $40, RAISE or FOLD

you click the buttons as the player in real life says what he needs to do

this app doesn't need to have cards because the cards will be dealt in real life, just need to keep track of each player. Money easily.

I could write it myself in not much time (I've been meaning to write this anyway and now you've reminded me). Do you have a TI calculator? If not, I could write it for the pc in Java. Would you be opposed to installing Java SDK and compiling the code yourself? Or if you don't want to do any compiling then I could make it ask for a bunch of inputs instead (you'd still need JRE to execute the program).

Do you want it to allow for:
- Rebuys and add-ons?
- People starting with unequal stacks?
- New players coming into the game?
- A player leaving while he still has chips?
- People sitting out a hand?
- Straddles? If so, from which positions?

Do you want it to enforce the raising rules? If so, should it have a Limit hold'em mode or only do no-limit?

Should it include an option to subtract rake from each pot?