I may keep regular Ubuntu on one of my machines, but I'm sticking with Kubunu on the rest now. I'm really lucky that quite a few people have thrown out their old broken PCs in the junk piles along the sides of the streets here, I've scavenged enough working parts from them to build two complete PCs to use for Aros, Linux, Haiku, Syllable, ReactOS, DragonflyBSD, and any other open source OSs that wouldn't run on my netbook. I now have a 1.5Ghz PC with 512MB RAM and a Dual Core 2Ghz PC with 1536MB RAM with CD/DVD drives and hard drives, and I didn't pay a cent for them!
A friend of mine had the Windows installs on both of her computers go flunky and didn't have a restore disk. I installed Xubuntu on the older one (a Pentium 4) and she didn't like that none of her kids games would run on it. The newer one I suggested she keep around for Win7 even though it came with Windows Vista.
It turns out that a fresh install CD of Win7 costs almost as much as a new tower anyway so she got a new tower and gave us the old ones. Now I've got Xubuntu installed on both (the 64-bit version for the newer machine). In the case of the newer one I just had to buy a 120 GiB SATA hard drive for $20 and the old one didn't cost me anything!
The new one has an Athlon x2 4400 and 2 GiB of RAM. The old one has 1 GiB of RAM and a Pentium 4. Both have DVD burners and all I had to supply was the mouse and keyboard of the systems they replaced: our neighbor's Pentium 3 with 128 MiB got the boot and our Pentium 3 with 192 MiB of RAM is idle as well.
