Here we go
1. ...let her take a picture of you naked?
Yep
2. ...get naked in a risky public place?
Possibly?
3. ...act like a little boy and call her "momma"?
No
4. ...let her give you a spanking?
Of course
5. ...eat her out until she has an orgasm?
With pleasure!
6. ...masturbate in front of her?
Again, with pleasure!
7. ...let her pee on you?
Maybe? Yeah, why not?
8. ...strip naked in front of her friends (guys and girls)?
As much as this I'd be terrified to do this, it'd turn me on so much, so yes
9. ...taste your own cum?
If she insists
10. ...obey a strict diet and exercise regiment for 3 months?
Possibly?
11. ...dress up like a school girl with a mini skirt, stuffed bra, panties, wig and makeup?
No
12. ...go without sex or masturbating for 1 year?
The wait would drive me crazy, but I think it'd just increase my anticipation of the event, so yes
13. ...let her tie you down first?
Absolutely!
14. ...shave off all of your pubes?
If I must
15. ...dress up like a french maid and do chores for her?
Yeah
16. ...let her put clamps on your nipples?
Yep
17. ...cum on your own face?
I'd hate it, but it'd be worth it
18. ...let her fuck your ass with a strap on?
It would be so humiliating, so yes 
19. ...strip naked on a live webcam?
No no no!
20. ...suck her gay friend's dick?
Probably
21. ...let him cum in your mouth?
NO!
22. ...let 5 or 6 of her girl friends fuck you with strap-ons and dildos while you eat them out?
Now that's a dream!
23. ...have a threesome with her and her guy friend (you give and receive)?
I don't see why not
24. ...be her sex slave for 3 months (she gets to do whatever she wants, mix between conventional sex and femdom)?
Where do I sign up? Of course!
25. ...be her bitch for 1 week (no sex, but a lot of dress up, chores, humiliation, and oral for her and her friends (guys and girls))?
Happily
Thanks, Tom