Mirror Mondays
Tutor Tuesdays (school girl outfits)
Whip It Wednesdays (whipped cream bikinis...yum)
Thoughoughly Clean Thursdays (shower/bathtub pics)
Flag Friday (you and old glory)
Stilleto Saturday
Sunblock Sunday (show those tanlines)

also considered...
Moderator Monday (post a pic that will get you banned)
Toon Tuesday (draw a picture of yourself naked...I mean what you look like naked, not be naked as you draw it)
Wii Wednedays (you playing your favorite video game)
Thoreau Thurdays (you reading poetry)
Fry-daddy Friday (cooking bacon nude...at your own risk)
Sapling Saturday (you and a tree)
Sin Free Sunday (you in church/temple/mosque etc)

Hope it gets the creative juices flowing, and since I can't comment on the pics after you post them directly, just let me say:
"Hot pic!"
"Wow!"
"(insert name here) is gorgeous!"
"Have an appointment with her next week!"
"Those are perfect!"