Maybe Mark Zuckerberg gave Twitter a boost of confidence. A day after Zuckerberg offered words of wisdom about the IPO process to the popular micro-blogging service, the company sent out a tweet:

"We've confidentially submitted an S-1 to the SEC for a planned IPO. This Tweet does not constitute an offer of any securities for sale."

Not exactly confidential.

Twitter's IPO has been in the works for several months, if news speculation is any indication. But the social network, which has more than 200 million monthly active users, has moved slowly, developing new advertising products, working with television partners, and hiring experts who understand the IPO process.

The next few months will be a whirlwind over at Twitter HQ. The company sent a follow-up tweet minutes after announcing its IPO: