I [insert your web 2.0 tool here], therefore I am?

This is the first time I've seen an entry like this, but I bet it is said often, and I bet the sentiment is stunningly pervasive, even if not expressed:

"no internet @ home since yesterday!How can I manage?I'm tired & concerned...so much to catch up with 2day.Feels like I didnt exist yesterday"

Don't know what to make of it, though. Is thinking out loud via social networking the new cogito? What does this mean for the future of epistemology?