From Early Stage VC, Peter Rip post about, "So What Does Web 2.0 in the Enterprise Look Like?
History can help us answer this question. If you are old enough to remember a world before PCs, then you have an unfair advantage. (Nice feeling for a change, huh?) You have seen history repeat twice and are likely to see it happen again. The answer is The Dominant IT Company defines the landscape for Enterprise IT. Everyone else follows.
"Computer Economics recently conducted a survey of visitors to its website regarding the perceived advantages in the use of open source software. Although not a scientific sample, the results are nevertheless startling."