As of March 2013 the website is no longer operational.
If someone wishes to take over the domain, feel free to contact me.
After a few long evenings, the website is now ready for real use.
The idea is much the same as the old bitcoin-notify, but other than that is has no connection.
TL;DR New Bitcoin notify service (Beta) - http://www.BitPing.Net
The system uses bitcoind to download the block chain.
And Abe to parse the blockchain into MySQL (So you can run the block explorer also).
Then a monitor looks into the database every so often, to see if there are new notifications to be made.
Really the most work is in making the user interface, and since it may still contain a few bugs, I will wait a few weeks before publishing the UI code.
The monitor and an installation guide is avaliable from day 1 however, so if you plan to run a similar website, you should start by getting bitcoind and Abe synced up.
The idea is that you enter a bunch of public addresses into BitPing.Net (or a self hosted database).
Then select the number of confirmations you require and which http address to call when a new payment is made.
Currently we only support 1+ confirmations, ie. no unconfirmed notifications and just email/http notifications.
The HTTP POST interface is very simple, and there is an example when you are logged in.
More notification types, and events will be added as requested.
There is a link to the github at the bottom of the page with a rough installation guide to bitcoind, abe and the monitor script.
Any feedback is very much welcome, thanks.