I've also been trying to get Citrix working, with the little knowledge I have thus far of Linux* and no luck so far. At this point Citrix is installed and I can log-in to our '.ica launcher' but it downloads the .ica instead of opening it and/or recognizing it with Citrix XenApp MetaFrame XP.

I did came across an interesting link I wanted to share(in regards to this):
http://www.bleb.org/software/maemo/

At the bottom you will find some information about Citrix, which besides being a bit contradicting (it isn't, but it is easy possible?) might help some more advanced users a bit more.

Meanwhile I'll be RDesktop-ing and/or OpenVNC-ing it through my PC.



* part of the reason I got the N900, it would hopefully accelerate the learning process the phone being one of my main gadgets