For quick capture, I think Drafts could work for you. It is built on the idea of quickly writing things down and then (possibly later) sending them to somewhere else.
I came here to recommend this exact thing. There is also simplenote, if you have cross-platform worries or don't want to spend the money--but Drafts absolutely is worth it. It's the perfect replacement for a pocket notebook--write down whatever; contact info, url, quote--send it to contacts, read it later service, notes application. The tutorial videos on the site are a great showcase.