It is possible - But has problems.
Basically, the amiga video mode frequency goes lower than your standard pc ( i believe its 15khZ on an amiga whereas a pc monitor goes as low as 30KhZ). With a standard Amiga - VGA convertor, you can use WB but some games / demos wont work. You need a scandoubler for that so that its on the 30KhZ frequency.
I think.
:-)
Kevin