Thank you all for the quick replies!
Regarding the site function: it's not a content site. It's more like a service (many web-services) and a frontend. Joomla may be a good platform for the frontend.
Regarding the richness of the .net framework: The server-side code is mainly data-mining stuff, so not much of the .net framework will be used.
All the back-side data-mining is done separately, so the front can be php and the back can be either one, according to the time it takes to create the system and to performance issues.
In-addition, the data-mining will probably need a lot of debugging, so .net for that part may be the right choice, and it doesn't have to be aspx. A windows-Service can do the job.
Here:
The raw data comes from the php web-service into the db.
When a user reads the processed data, the php frontend calls a .net web-service from a server that reads the data from the db.
That way, we get a "standard" web-site (for me, "standard" means AMP on a Linux),
and we get high debuggability of the data-mining in the .net server.
Only the .net box is not free. the db and frontend stay free. Good.
Zend looks promising. Never used it. I'll give it a try.
Adrian Aisemberg
www.sharpregion.comwww.svnmonitor.com