The first is from CNBC, entitled "IPO Market Shows Signs of Life." The article quotes Renaissance Capital as saying that there are over 209 companies in the IPO pipeline looking to raise nearly $50 billion. Link is here: http://www.cnbc.com/id/45196527?__source=yahoo%7Cheadline%7Cquote%7Ctext%7C&par=yahoo
The next article, from Seeking Alpha, is "The IPO Buzz: Stepping on the Accelerator." This article takes a look at the IPOs expected this week. Link: http://seekingalpha.com/article/305986-the-ipo-buzz-stepping-on-the-accelerator?source=yahoo
Finally, a Bloomberg article "Zynga Said to Plan IPO After Thanksgiving" basically says everything in the title. Link: http://www.bloomberg.com/news/2011-11-07/zynga-said-to-plan-ipo-after-thanksgiving.html