For multiple VMs networking together, I still just use VMware Workstation. On a multi-core machine with lots of RAM, it's simply sweet. And dead easy to set up, with cloned VMs, snapshot trees, and virtual networking/bridges.

Oddly enough, I too was looking at VirtualBox this week. Read all about it, read the user guide cover to cover, etc..

It just looked like too much manual fuss to configure, and lacks cloning (easy to do outside the program, though), and their idea of a snapshot tree is just a linear revert chain. Not at all the same thing.

Stuff like that *matters* when teaming up multiple VMs. Oh yeah, VMware has "teams", too.

Cheers