To get an understanding of the trends for Enterprise software convering with trends on the Web, take a look at Dion's blog- Enterprise Web 2.0. I first ran across Dion at Mix06 last year. While many enterprise software development companies (e.g. Microsoft, IBM, SAP) are focusing on these Web trends, I think Dion does a good job at looking the grassroots efforts in this space and what smaller software vendors and the enterprise customers themselves are doing.