I gave the first four I mentioned a try. Here are my impressions:
xPUD: I ran it from USB thumb drive which was fast and easy but I couldn't figure out how to get my wifi to work. It also seemed to forget everything when I rebooted, losing all settings and customization.
Arch Linux: Won't install from USB. I used UNetbootin to transfer the ISO onto a bootable USB drive, but installation failed and kicked me out to the command line. The error message sounded like it couldn't find my hard drive.
Joli OS: I used the .exe file to install alongside Windows. It works as advertised. Even the WiFi works from the get-go. An interesting Cloud OS. It does have a couple of strange problems installing or uninstalling a few programs. I think I still don't want it as my main OS on my netbook.
MeeGo works really well off a USB drive and boots fast! It's pretty cool, too. I need to play around with it some more, but it still seems to be missing something(s).
I can't speak for Arch Linux, since I couldn't even get it to work, but the other three make me feel limited. I feel like I don't have the freedom to install whatever I want and tinker around with stuff. They feel restricted and limited in that sense.
I don't necessarily want a Cloud OS. Is there an OS that has all the abilities of something like Ubuntu but is really light on resources? Like a vLite for Ubuntu. :-D Maybe I need to look into Tiny/MicroCore
I just want my machine to feel snappy. This thing is exponentially more powerful than my old 386/66. Why does it feel slower?
I'll look into Linpus Lite and a few of the ones you mentioned, iphigenie. Thanks for the suggestions!
I noticed I have 22 GiB of Linux Distro ISOs in my download folder...