You know that things have definitely change when Forrester publishes a report urging large enterprises to let their employees use Macs. Having previously worked at a place that didn't allow Macs, I can attest to what analyst David Johnson says:
That leaves a lot of employees to find their own ways to get around corporate prohibition. Companies Forrester spoke with for this document described a gray market emerging internally, where employees share tips and strategies to use their Macs at work and bypass corporate roadblocks.
I remember having spent way too many hours trying to mount my iDisk on the work supplied PC, even messing with the command line after numerous Google searches. I managed to do it, but it was such a hassle that I just brought my personal MacBook to work and hacked my way around making it work.