I just wanted to post to give a head up to any users of my KDE 3.5 on the N810 or 800. KDE 3.5 install relies on tablethacker.com to install KDE. I just paid the 108$ for hosting tablethacker.com for the year, after this the install process will no longer be available. This gets you out to Dec 2010, so if you are using KDE, you should find a reliable backup and restore process to ensure you can use if beyond 2010 if this interests you. Using console-tool you can make backups and restore. I had planned on letting this domain go this month, but looking through the web logs on tablethacker.com, I can see people are still using the KDE install process. I was able to cover the costs for the next year, but after that it will be gone, and most likely nobody will be using this anyway.
If you want to install this manually
look at http://tablethacker.com/software get these two files KDE358v2.tar.bz2 and SUPv4.tgz
As root user from the following
tar jxvf /path/to/KDE358v2.tar.bz2
tar zxvf /path/to/SUPv4.tgz