Seattle rider here too, many years.

1) well waxed leather work gloves over padded cycling gloves, with or without thin wool liners inside depending on temperature.

2) Gore tex headgear is nice. Gore came out with a gore tex cycling cap for winter 2008 that is the flash.

3)big, big front mudflap keeps drivetrain and your feet drier.

4) quick dry, softshell pants of some configuration or other unless it's really drenching. Then there are a few stretch waterproof pants that really work well.... MEC in Canada has some. I've also been testing stretch Brockwood Agility fabrics in a military spec pant that really performs well in the wet.

5) I like wool layers. I have wool t-shirts long and short sleeves that make cycling feel dryer in the rain.

6)Softshell fabrics have their place on the intermittent shower days or during light rain.

7) toe booties.

8)It doesn't snow consistently enough in Seattle to leave a bike with studded tires on it, but I've got studded tires premounted on rims the same width as I'm running on two of my bikes (LHT and northroad Crosscheck) so I can easily swap out without any adjustments to brake pads.

9) check out this new castelli raincoat!