I used my Aspire One all thru the Windows 7 beta, RC and eventually RTM. It ran very well on that little PC. Eventually, my battery stopped holding a charge and is now running Ubuntu Server under my desk.
There really isn't much to installing the Win10 preview. Download the Windows 10 ISO from here:
Download Windows 10 Technical Preview - Microsoft Windows
Download the Windows ISO to USB tool:
Windows USB/DVD Download Tool - Home
Use the second download to take the ISO (the first download) and turn it into a bootable USB drive. Plug that into your Aspire One and go through the installer. You may have to choose the clean install, I don't think Windows 10 can be upgraded from XP, but I'm not sure. Be aware that the Windows installer will delete everything from your netbook, so back up as necessary beforehand.
If you try it, report back. Let us know how it works!