I've been doing more mod_perl hacking of late, and have been running into the issue of diagnosing problems on different operating systems.
Parallels has basically failed me at this point. I paid $99 for it initially, then they released 3.0 a few months later and wanted to charge me another $99 to upgrade. Shortly after, my 2.x version started acting wonky, taking upwards of 10 minutes to start virtual machines, eating up all cpu in the process.
I called up VMWare a week ago and asked them if they had any discounts for open source developers using VMWare to do open source development. The person I talked to didn't really understand what I was asking for, so it didn't pan out. I've download a trial version of Fusion, and it has been working great.
So does anyone know of deals with virtualization environments for open source developers? I can't promise that I would use the virtual machine code _only_ for open source development, but that is really what is driving my needs right now.