The best thing on the web right now is this. Go and play, and waste years of your life [via tom]. I recommend you create a profile first, so you save your scores.
Interesting puzzle. I can do about a quarter of these? If you can solve any, post them as comments and impress me!
example: 24 H in a D = 24 hours in a day
1 26 L of the A 2 7 D of the W 3 7 W of the W 4 12 S of the Z 5 66 B of the B 6 52 C in a P (WJs) 7 13 S in the USF 8 18 H on a G C 9 39 B of the O T 10 5 T on a F 11 90 D in a R A 12 3 B M (S H T R) 13 32 is the T in D F at which W F 14 15 P in a R T 15 3 W on a T 16 100 C in a R 17 11 P in a F (S) T 18 12 M in a Y 19 13=UFS 20 8 T on a O 21 29 D in F in a L Y 22 27 B in the N T 23 365 D in a Y 24 13 L in a B D 25 52 W in a Y 26 9 L of a C 27 60 M in a H 28 23 P of C in the H B 29 64 S on a C B 30 9 P in S A 31 6 B to an O in C 32 1000 Y in a M 33 15 M on a D M C