No – don't make an about page. Well sure, make one, but it probably won't help a great deal.

You need to be showing people what it's about, the instant they visit your site.

I saw your page, thought "hmm, not quite sure what this is" and left. I'm not going to stick around to read an about page.

How about a list of reasons why thingist is awesome, or a list of what it can do that will solve or fill some need, promoted to the front page?