Turns out the filler neck wasn't the problem, was a bad Check Valve that leads from the fluid lines up to the nozzles under the black insulation under the hood.

Found how to fix on Bay13.
http://www.volvospeed.com/Repair/windshieldcheck.htm
Went to volvo shop, bot the "T" check valve part for $10.75.

Opened hood, take a quarter (or flat screwdriver) and undo the black plastic clips holding the black insulation to the underside of the hood. Starting near the windshield and going about 1 or 2 back along the side.

The fluid hose comes into a black plastic "T" valve-into the bottom, then out to the left/right side. Replace (making sure not to put in bad one). Worked like a charm.

The guy told me that the valve is there so fluid can only go one way. When it goes bad, fluid goes NO way. Re-attach the insulation and you're good to go.