Teleporting allows you to move a running virtual machine from one physical computer to another. The difference between teleporting and VMotion is that, to use VMotion you have to be running VMware's "bare metal" hypervisor (in other words, one of the company's VSphere enterprise virtualization products). With VirtualBox, the standard version will allow you to transfer running VMs and you can move them between any of the supported "host" platforms.
VirtualBox is arguably more complicated than VMware Fusion or VMware Workstation, but it is just as powerful and it's free! Oracle's VirtualBox gets a rating of 5 out of 5.
In my fooling around with testing of VirtualBox under OS X I tried running a newish operating system called Syllable.
Syllable was intended to be simple and easy to use, though one look at the release notes for 0.6.6 will tell you they have quite a way to go.
The bottom line on Syllable is, don't bother. Despite this project (based in the U.K.) apparently having a significant following (oddly enough, mainly in Scandinavia), I couldn't get it running properly on either VirtualBox or VMware Fusion despite the live CD actually having startup options for all of the major virtualization platforms.
Syllable gets a rating of 0 out of 5.
Finally this week, I have a freebie Windows tool for you to check out: Slimcleaner which is described by its publisher, Slimware Utilities, as "A Crowd-Sourced, Cloud-Based, Social Network for PC Maintenance" tool.
Targeted at techie consumers, Slimcleaner will clean up the cruft that gets left on Windows (browser caches, log files, memory dump files, prefetch data, and so on) with amazing speed.
Slimcleaner will also show what startup and service items are running and which applications are installed and present community opinion on what is useful and what causes problems. Slimcleaner also provides access to multiple antivirus scanners running in the cloud to check the desirability and safety of installed software. The only missing feature is a registry optimizer and cleaner.
Slimware's community rating system is interesting and does address the common problem of identifying stuff you find on Windows systems and then spend ages trying to figure out what to do with it. Slimcleaner gets a rating of 4 out of 5.