Trumpet,
I can give you a nice sugarbabes calendar.....I bought it for my daughter

, cough cough.
lol
It's a bit late for a calendar now, i presume you mean doing sometime during the season in prep for next year!.
Another idea would be to take group photos during the rideouts or group bike photos, there would then be 12 to choose from by tail end of year.
just a thought, i also like the vote idea too, but some folks maybe not have a digital camera or be very good with photos.
its good discussion point though.
Rgds
John