So I've taken the liberty of contacting several game stores in the greater Seattle area to gauge their planned support for Warhammer: Invasion. Thus far, I've heard back from two stores:
The Game Matrix - Planning to carry the game and also potentially interested in having people demo the game. No planned events yet.
Blue Highway Games - Planning to carry the game, but not planning to hold any events in light of the (lack of a) player base for FFG's other LCGs. Willing to host if people are interested, however.
Also, I know from rings that First Pick Games is planning to support the game, though I haven't heard anything specific about an event yet... I'll let him share more about that
I'll post more once I hear back from the other stores.... anyone else out there in Seattle?