I would hold off a little bit on making a purchase on the s10-3t if you are looking to only run OSX on it. If you want to run Windows 7 and Ubuntu with support for networking, touchscreen, wireless etc., it makes a great choice, but the OSX support is still in its infancy of getting things running properly.
Right now in OSX from what I have seen through my experience, the video is not accelerated, the touchscreen needs some work, there is no network support at all at the moment, there is no support for the accelerometer so no screen flipping, and power management is not implemented. That is not to say these hurdles will not be overcome given time or using workarounds like swapping the internal wireless card, but right now it is a little sketchy if you want to use it as a touchscreen mac.
I have made a few installs to the machine using both the Netbook Installer 0.8.4pre http://code.google.com/p/netbook-installer/
and the S10 Enabler 1.1.13 viewtopic.php?f=33&t=3280
, both of which have documentation on how to prepare the install either on the package or on the site. If you are going to install to a mbr partitioned disk use the S10 Enabler, otherwise you currently have to modify the install image made with the NetBook Installer to see the disk you want to install to.
I will post any updates or results I have in this thread as they come.