Just some random thoughts:

To the president of Iran:

Israel has been a sovereign state longer than you've been alive. What gives
you more right to exist that it does? Shut up and stop worrying about
Israel. We'd have fewer problems in this world if the religious fanatics
(Jewish, Christian and Muslim) would all just shut up and let things be.

The mayor of New Orleans:

Is spending billions of dollars to restore a levy system that ultimately
didn't protect your city really the right thing to do? How about just flat
out condeming the land and returning it to it's natural state? Yeah, I know
some people who lived there would have to be displaced, but the funds being
spent on the levy system could be used to help them out instead. Ultimately
returning a lot of that land to it's natural state would provide more
protection for New Orleans anyway. Quit talking aobut your "Trinity" and
stop spending my money for your political gain.

To Microsoft:

Thanks for the initial problems with your X-Box 360. It's nice to know that
even the big guys can ship products with problems.

To President Bush and the CIA:

If this CIA secret prison scandal is true, it's no wonder the rest of the
world hates us. If it's true, the United States needs to come clean about it
NOW, and EVERYONE involved needs to be fired and/or go to trial.

You cannot set a shining example of morality and justice by violating your
own principles. What happened to the philosophy of innocent before proven
guilty? What happened to freedom and justice? Sure, a few bad guys might get
away if we follow the established extradition procedures, but that makes our
other legal actions in hunting them down more justified.