I'm not web 2.0 enough

So I convinced myself to create a twitter account (http://twitter.com/135746) and a tumblelog (http://135746.tumblr.com/), but I am not sure I really get it.

It took me a long time before I finally got RSS, but once the lightbulb* went off, I got it.  Will these two be the same, or will I end up as a relic that can't understand the basics of where things are going.

-- Andy