There is pyRdesktop-client in the repos that has a very nice user interface. Very simple to use just like the windows one. Just make sure that all ports and such are forwarded just like any other remote desktop. There is also VNC viewer which is very user friendly as well and works cross platform. A little googling on both will be needed as always with programmes that u arnt used to. The added advantage to being a new Linux user and having a N900 is this community. Im sure many people on here myself inclueded have been in your frustrating situation of something not working. Usually a quick search on the forum solves most issues. By the way Rdesktop and issues is explained in great detail on the wiki pages at the top of the forum page. Hope yoiu get it working the N900 and Linux is well worth the time and effort and will get easier with time as with all operating systems.