Bitcoin Forum

In my bitcoin-qt client I get a balloon notification whenever coins are received in my wallet.

Is there a way to tap into this functionality from bitcoind? I have a cron job set up to check my 'expected incoming addresses' for changes in the balance, but cron has a resolution of one minute which is pretty crap for this kind of thing, and I would prefer an event-style code-base where possible rather than a scheduled-task-style code-base.

Any tips on how I can tap into this to trigger some other event as soon as an incoming transfer is detected from bitcoind?

That functionality is probably going to end up in the 0.7 release.

Electrum has a 'watch_address' script that you can easily adapt to your needs

I built a simple application that checked my wallet balance every 30 seconds. based on the change, an email was sent to my phones txt address telling me a deposit or withdraw was made. very useful!

You could setup an agent at bitcoinmonitor.net to monitor the 'expected incoming addresses'. You can get email, http callback or jabber notification immediately when you receive (or withdraw) any fund. Side effect is you don't have to have bitcoind running to get notifications.