In respond to an email, Steve Jobs has confirmed that Printing is indeed coming to the iPad. This is what the sender of the email asked Steve Jobs:
Why no printing on the iPad? What gives
and this is what he got in response:
It will come.
Sent from my iPhone
iWork makes its beautiful debut on the iPad but still lacks the printing feature. The email response (if not fake) confirms that Printing will come to iPad but no time commitment is made.
I think iPad will get printing feature with the firmware 4.0 later this year.
Update 1: Download iOS 3.2.1