Here are a few amusing typos I’ve encountered in my work:
“Dear Sir or Madman:” (Opening for a letter)
“I have been whoring for the company for five years” (Should be “working”)
“After I entered Arse, …” (Should be Ares, a company name)
Just thought I’d share.
My favorite is still the series of “pubic opinion polls” one of the English-language newspapers ran awhile back.
Are you sure they are typos ?
When closing a letter, I have often typed “Best Retards” inadvertently instead of “Best Regards”.
Fortunately, I believe I’ve caught all of them before clicking Send.
Irishstud
Thats more of a Freudian slip, and I wouldn’t blame ANYONE for making it. 
Anyway, I was on the bus the other day and there was an ad for some coffee shop.
“Healthy & testy”, it said.
I took a pic with my POS phone, but it’s hardly viewable.
A couple more, where the meaning turned out just the opposite as what was intended:
“I hereby offer my undeserved recommendation” (should be “unreserved”)
“It is worth nothing that…” (should be “noting”)
not a typo, but funny. Killin Infant School
This is utterly brilliant. I laughed for about 5 minutes. Thank you.
Error or not, it really is a wonderful, wonderful opening. In fact, the reader questioning whether it is truely an error is the best part.
How about this one I came across today, written by a jazz student:
“My love for jizz grew stronger every day.”
The company’s boob value is up 14% this year. (Should be ‘book’.)
Tzu Chi, a Busshist charity organization
In obituary: “Devoted Sister. Beloved cunt.”
http://www.youtube.com/watch?v=BpDiZLrTHX4
Curb is easily my favorite show.
I ended up typing “Untied States” one too many times. It has now been added to Word’s autocorrect list.
Since the hundreds of sub-evolutionals for whom I edit only notice a problem if Word flags it, all kinds of crap gets through.
I probably change form to from, forth to fourth, and fist to first 9 or 10 times a week.
But funny?
Well, I got this last week.
“Operation is complicated and the user feels incontinent.”
Yes, the structure is screwy even without the misspelling.
Apparently the New York Times not long ago released an article about the “Large Hardon Collider”! 
And from just now: “super blab skills” (superb lab skills)
Instead of 口試 (oral exam), a client wrote 狗式 (doggy style)