Despite the recent flurry of venture-backed companies that have gone public, there aren't many more waiting in the SEC's wings. Among the few in the IPO queue is disk storage provider Nexsan Technologies Inc., which updated its prospectus in June, despite the chilly IPO climate.

In the second episode of The Deal's new Behind the Money series on IPOs shot on location at the NYSE Euronext, we spoke with James D. Robinson IV, the co-founder of New York's RRE Ventures LLC, a backer of Nexsan.

Robinson and co-founder Stuart Ellman launched RRE 15 years ago and have since raised more than $1 billion, invested in 100-plus companies and had 30 positive exits, including many that have gone public.

Robinson's father, James D. Robinson III, the former CEO of American Express Co. (NYSE:APX), serves as a general partner at RRE.

Among the startups RRE has invested in recently is Betaworks, the innovative hybrid firm that both backs and develops Web 2.0 startups, including multimedia microblogging service Tumblr Inc. and URL shortener and Web analytics startup Bitly Inc.

Robinson, who is called Jim or, on Twitter, @jdrive, says that in nearly 20 years as a venture capitalist, he has never seen such a high concentration of VC-backed companies with the right metrics to go public once the market heats up.

Watch the video with Robinson below or download it on iTunes. Watch our conversation with Deborah Farrington, a partner of StarVest Partners, which backed NetSuite Inc. (NYSE:N) in the first episode in the new series. - Mary Kathleen Flynn