These other ones are great and funny (check out the one under letter "V", ha ha!). They were created/ recommended by a drama teacher (as you can see, I just love this subject):

A - Around the rugged rocks the ragged rascal ran.

B - Big black bug bit a big black bear and the big black bear bled black blood.

C - Can I cook a proper cup of coffee in a copper coffee pot?

D - Don't doubt the doorbell, but differ with the doorknob.

E - Eight gray geese in a green field grazing.

F - Fine white vinegar with veal.
The free thugs set three thugs free.

G - Grab the groundhog from the glazed grass.
Grey geese in a green field grazing.

H - High roller, low roller, lower roller.
How can a clam cram in a clean cream can?

I - Inexplicably mimicking him hiccupping.
I wish to wash my Irish wristwatch

J - Jingle jungle jangle joker.

K - Knit kilts for nasty cold nights.

L - Little lucky luke likes lakes, lucky little luke likes licking lakes

M - Monkeys make monopoly monotonous.

N - The Next nest will not necessarily be next to nothing.

O - Octopi occupy a porcupine's mind.
Only royal oily royal oil boils

P - Peter Prangle, the prickly pear picker, picked three perfectly prickly pears.
A proper copper coffee pot.

Q - Queen Catherine wakes the cat, and the cat quietly cries.

R - Rubber Baby Buggy Bumpers!
Roberta ran rings around the Roman ruins.

S - Some shun sunshine. Do you shun sunshine?
Six stick shifts stuck shut.

T - Three thick thistle sticks.
The thirty-three thieves thought that they thrilled the throne throughout Thursday.

U - Unique New York, Unique New York, Unique New York.

V - Venti, Grande, Tall - Very Grand Words for Large, Medium, Small.

W - Will's wetsuit is round and wet and rough and wide and ready to go on a watery ride.
Wayne went to Wales to watch walruses.

X - Xylophones exist or so existentialists insist.

Y - Yoda met a Yeti on the Plains of Serengeti.

Z - Zoologists illogically love to read astrology.

Taken from Wade Bradford, plays/ drama guide http://plays.about.com/od/actvities/a/enunciation.htm