If you have information regarding the price of promotional items or advertising, please post it here. The idea is to figure out what things cost, and what kind of marketing budget/donations we would need to get things moving. I'll start things off with a flurry of googling for some ballpark prices for customized promo items:

Playing Cards
1 deck: $22-$25 each
100 decks: $4.25-$8.00 each

Lanyards
100 lanyards: $2.00 each
250 lanyards: $1.25 each

Pens
cheap pens $0.18 each
decent pens $0.45 each, and up

Coasters
500 cardboard coasters: $0.49 each
300 mousepad coasters: $0.79 each

Mousepads
24 mousepads: $4.75-$5.95 each
100 mousepads: $2.09-$3.49 each

Custom car window decal
$5.00 each

Magnets
250 magnets for $0.79-$0.99 each (bigger sizes for more $)
500 business card sized magnets for $0.20 each

Bottle openers
250 magnetic bottle openers for $1.17 each
500 keychain bottle openers for $0.49-$1.42 each (based on size)

50-page customized 4"x5.5" notepad
10 notepads for $4.50 each
100 notepads for $2.99 each
(extra for magnetic backing)

Under donations, we have a list of some of this through cafe press. I've personally used cafe press to make some custom geocaching swag, and it's really easy to use. I'm not sure who is in charge of what should be added to cafepress, but you can browse the "fun stuff" they have to add to our already semi large list of items.