About opening source: I like coding it and currently do not need a help, thanks. I wish to open critical app parts for 'security review' soon, but I probably do not open source it fully. It is a service, as mybitcoin or mtgox is.
Pool is strongest when there is plenty of mhash/s, so I have no motivation in creating another pools.
I understand that. Nevertheless I would feel more comfortable if the source were available. That way we could continue the project if you ever get bored and decide to quit or are unable to continue for some reason outside your control.
Maybe we could buy the source from you. How much would you ask for it?
About competing pools:
Generating inside a pool doesn't increase your overall Bitcoin reward. It just offers you smaller rewards more often. The larger the pool the smaller your share of each generated block, but a larger pool will generate blocks more often. Pool size should have no impact on each member's reward over a long timeframe.
If what I wrote above is true, there's no incentive to create competing pools and no incentive to discourage anyone from creating competing pools.