Earlier this month Wacom released Driver 6.02-1 for Windows Vista. I've been running it for about two days and running this driver solves the problems I was having in January.
Once I installed the driver, I went to the Control Panel for Pen and Input Devices:
And in the Pen Options tab, I clicked on Pen actions Settings and disabled the "Enable press and hold for right-clicking".
And then went to the Flicks tab and disabled the "Use flicks to perform common actions quickly and easily" setting.
And then everything my Wacom tablet on Vista worked just like it did on XP.
I verified by trying the following applications:
Link to Wacom site
Link to driver [UPDATE on 2008-06-04]
The original link I provided no longer works. Instead go here: http://www.wacom.com/productsupport/select.cfm