<p>A client has asked whether or not I can provide some support for his intranet which runs on Oracle Application Server Portal. Not having used this technology before I thought I'd ask if anyone else has and what they thought of developing for it. </p>

<p>I'm a c#/ASP.NET developer so I note with apprehension that there's no mention of .NET in the developers guide. Anyone tried to make the two work together and lived to tell the tale?</p>

The only experience I've had with an Oracle Portal was obliquely, when I inherited a system that used one for a relatively simple maintenance web application.  A large part of my opinion of Oracle's stuff comes from my background with SQL Server/ASP.NET, but Oracle is just plain harder to set up and administer and keep running, and that applies not just to the database but also to auxiliary stuff like Oracle Portal, their SOA suite, their Mobility Server etc.  Even experienced Oracle people tend to agree with this, so hopefully I won't piss anyone off.
I would definitely not provide support for an Oracle Portal application (or any other Oracle product, for that matter) unless I had a lot of experience with the tools.