Surf the Google Wave
I've watched all 80 minutes of the presentation on what Google Wave is and it looks awesome. I work as part of a team that spends a lot of time managing data and communications both internally and with other teams and to do this we use a mind-numbing array of email, IM, Skype, Office docs, Wiki pages, web pages, OneNote and more besides so I can see instant applications for Wave technology.
Not least are the contextual spell checker and the translation tool for communicating with colleagues whose primary language is not English. It does look like an exciting step forward in communication.