I've got a working version of an event payment module at http://dev1.passingphase.co.nz. Just sign in as username: testadmin, password: admin and give it a whirl. It is still in development as I'm currently integrating it into a site.

Webmasterkai, it may not have been a good idea to start on a module that someone else has already indicated they are developing, but if you want to join forces, then maybe you could use your energy to do refinements, but it depends how far you have got and what direction you went.

My original sponsor bailed so I am looking for contributers but I will be working towards a robust solution regardless for the sake of the current site I am developing, but in which my quote did not include the cost of developing this module. If anyone is interested, then I am happy to send the dev version to you for a $30 contribution. Once I've received 5 contributions ($150 was the original quote) then I'll post the dev on this site and keep it updated.

I based my module on the same suggestion as gorcon.