Thanks for the steps.
Yes, GParted is definitely also a solid way to increase the disk space. For the Micro Core linux, the 'wanos-fdisk' method is quick and easy:
UPDATED:
Change Datastore Drivesudo /tce/etc/wanos/wanos-fdisk sda
sudo reboot
sudo mkfs.ext3 /dev/sda2
sudo reboot
Set the datastore to sda2 in the guiComing to the Ubuntu Raw Disk image soon is a partitioning script that will run on the first bootup. The Raw Disk OS partition will be e.g. 6GB to be burned with a disk imager tool like win32diskimager and then the script will partition the datastore on the remaining part of the drive on the first boot.
This will avoid the manual requirement to partition the disks.
Also be sure to update Ubuntu to 3.0.3 to avoid bugs related to switching the datastore back and forth between partitions.