eWeek publised a survey recently (PDF available here) from IT professionals around web 2.0 in the enterprise.
Blogs and wikis remain the most commont technologies but RSS (not clear what they mean by RSS) is a close third:
It made some interesting reading:
“According to Forrester …. by 2013 investment in customer facing web 2.0 technology will outstrip spending on internal collaboration technology”. You can see this from the results of the survey relating to audience:
“56% of respondents said none of the [web 2.0] applications … had been implemented without company support”
According to Forrester “spending by enterprises will reach $764 million in 2008 but grow quickly over the next 5 years, representing an additional $3.8 billion in spending”