In our Flash Analysis of the current startup investing environment, enterprise collaboration – and social networking in general – didn’t get high marks as attractive investments. (Enterprise collaboration did pretty well among the professional investors we surveyed.) But the sector is heating up. Jive Software filed its S-1, and the Yammer integration features I said were coming went live yesterday. Likewise, IT managers we interviewed were investing in and deploying chat for support, and starting to look at other social networking tools more aggressively as well. Besides encouraging collaboration, such tools may make IT staff more productive through multitasking, speed up processes that otherwise need transcription from voice and provide better data for corporate insights and knowledge management.