OK, I did some installing yesterday. Unfortunately my time with this was a bit limited, but I managed to do the following (w/ the following errors...).
I had burned two CDs: Arch linux and Xubuntu Feisty Fawn.
First I wondered if I would be able to keep the /home partition where I had already DL'ed a bunch of vids from my PVR, but then desided I would not even try to do that as I feared it would mess things up or at least make it more complicated.
The Arch experienceI booted with the Arch CD. The first parts seemed OK, but I really cannot remember all the choices I made. The first thing I did was to choose the Finnish keybord set and the partition went well as far as I could tell (I partitioned the whole HD anew).
I chose all the base packages (as suggested in the installation guide) and chose a few packages from the network packages (I could not find any madwifi packages).
I made no changes to the config files (I chose vim editor), except at one point I alredy typed in my IP Gateway (192.168.254.254), but I was ahead of myself as I didn't have Madwifi installed and the only way this PC can communicate with outside world is the Atheros chipset WLAN PCI module. I do have Madwifi on my USB flash and I'm planning to install it after the system would be installed.
OK I rebooted (with and without the CD inside) and every time got Kernel panic! It said something like it not find some partition, but cannot remember what it was exactly.
I re-installed the whole thing, but I got the same Kernel panic.
As I said I had limited time and had to pop out for awhile. When I got back, I decided to try Xubuntu.
The Xubuntu experienceI put the Xubuntu CD into the slot and booted.
I saw some choices in the welcome screen where I chose e.g. the VGA screen and Finnish kb settings. Then I chose 1. for the installation.
It went fine. I had some chores to do (yes, my wife makes me do work around the house...

) at that time and went back in 20 mins Xubuntu was running! OK, I thought this goes nicely.
The desktop however had no menus (no panels on top or bottom of screen) nor was it the resolution my TV set would have been happy with. There was a desktop, but none of the text-labels of the icons on the desktop were legible... I tried to find my way into the screen resolution menu with my RMB menu, but as I am not familiar with *ubuntu or xfce desktop, I felt like someone who had just lost his contact lenses...
I had to bring in my flat panel from my main PC... Not a good sign as this was something I was hoping to avoid...
Well, I got to the screen resolution menu, but there were only the following choises: Default (the one currently on with a far higher resolution than 640x480), 640x480 and 800x600. OK, I thought this is great, so I chose 640x480. But the screen was totally screwed. The best way to describe it is to say that it had vertical lines, but they were mixed and the all the lines were not in line with the next... I could see something changing when I moved my mouse or pressed tab to change the active selection in that window...
Aahh, I thought, this is the TFT acting up for very low res. source. I changed to my TV set, but no help. It then returned (or I pressed cancel - don't remember which came first) to that higher resolution. I also tried the other res. of 800x600, but no help. It was the same...
I rebooted and re-installed the system (remember, it was easy, it fired up the live version itself).
Now I got better screen choises! There was even the possibility to choose 320x200 resolution! OK, I chose 640x480 and it worked fine!
I started the installation with the shortcut on the desktop. Nice, but... Now I got the same problem I was running away from in Mandriva/KDE environment:
With this resolution the whole installation dialog could not fit in my screen!!! Aaargh...!
I changed back to a higher resolution (don't remember what it was now) and finished the installation process. That was all the time I had left yesterday for this project and shut down the system. I told Xubuntu to shut down (from exit) and took my TFT back downstrairs. When I returned one hour later, the PC had not turned itself off, but instead I had to press the power button and it shut down immediately...
I'll do some more testing tonight, but I'm thinking of trying the Arch installation once more. I really was disapointed that the xfce didn't work well with 640x480 resolution screen. I'm hoping to try out the E17 wm that scarecrow was talking about. If that would work...