How much Web 2.0 functionality is enough?

Web 2.0 is Read/Write Web. You can write a journal, write collaboratively, upload: photos, videos, audio files, you can build networks. So you can have accounts in blogger, pbwiki, fickr, youtube, odeo, etc. We are not even talking about technorati, del.icio.us, and the like. But how much is enough?

For that matter, what is Web 2.0? Non-plussed? I'm not surprised.

"Even wikipedia isn’t really sure if web2.0 is more than a collection of technologies that have been in place for ages…" Amarjit even wonders too.