Update!
Sorta.
I had the consultation with the neurosurgeon today, pretty much nothing has changed. He was a little less comittal about whether it was benign or malignant. I'll probably have the biopsy done in a couple of weeks which will involve cutting a small slit in my scalp, spreading it aside, cutting a hole in my skull and then sticking a probe in there to get a piece of the tumor to do the biopsy (which will take a week or two to run all of the tests.) If the piece they get is inconclusive, more... aggressive techniques will be employed.
The surgery will involve an overnight stay in the hospital for observation to ensure no brain bleeds or infections occur.