It has been claimed on this site that the fundamental question of rationality is "What do you believe, and why do you believe it?".
A good question it is, but I claim there is another of equal importance. I ask you, Less Wrong...
What are you doing?
And why are you doing it?
My exoshell used to be plain text files, then it was MediaWiki, now it's Google Wave.
Not just the raw text itself, but scripts to extract XML tags and other data from the text files, and do stuff with the data.
That was a relatively straightforward process with raw text files.
It was a bit more complicated with MediaWiki, but that seemed to work even better.
Google Wave has the advantage of collaborative editing in realtime, and some advanced search features, but it has lots of serious disadvantages, (including there currently being no way to export to XML!) but hopefully this limitation will soon be overcome. For now I'm using the Ferry extension to export to Google Documents, and from there I batch-export to html.
Oh, and I recently started some experiments with scripts to extract tags from this data and make some fancy quantifiedself graphs. If anyone is interested in hearing more about this, please let me know.
I think you are the first person I know of, who actively uses Google Wave.