Iwan Rahabok over at Red Dot has created an an OVA of a really small virtual machine, it boots in 1-2 seconds and is based on the awesome Tiny Core Linux.
Iwan: What I did is only...
- Install it to a disk so you don't need the ISO.
- Create a VM with 48 MB of vRAM. It only needs 41 MB actually.
- Keep the vDisk at 1 GB just in case you need to add more things. Because of thin provisioning, only 40 MB is used.
- Package it into OVA format