What is planned next for CENT?
Nothing. If it breaks again I'll fix it, otherwise I have other projects to work on.
Maybe someday in the future when i have time I'll add newer updates from Bitcoin/OMG.
Can someone confirm that the new version also fixes the upper limit of possible pennies in one wallet?
There is no upper limit of what your wallet can hold, only of what the GUI can display and what you can send in a single transaction (as far as I'm aware).
That value is 1billion, as that is the MAX_MONEY value used by the getwork system. I could fiddle around with some variables to get the wallet to display higher values, but it isn't really a priority. If you need to send more than 1bil. to one person, try sending multiple transactions.
I have no idea why Cryptsy's max withdrawal is 100mil. I don't work for cryptsy.
This will take care of the amount of coins mined in the future. It should be kept to an amount where it is profitable for miners to still mine coins ,and or increase transaction fees to keep the network alive. As far as reducing the amount of current coins in circulation, some friends and I are in talks about the pros/cons of buying x amount of coins and destroying them (sending them to black hole, putting on paper wallet and then destroying the wallet, etc)- therefore reducing the "float". We are trying to determine how many we can destroy while hopefully still being profitable for us and everyone involved.
Feel free to destroy as many coins as you like. I'm not really concerned with boosting coin value myself.