It gets tied into my "vote up" reflex that I've gotten used to from reddit and HN. Normally I'll come across something I like, think "I should vote that up" if I found it from some place with votes. After I'm primed with the idea of micropayments I think "I'd micropay for that".
I don't know what I'd pay, but I get the feeling that the thought corresponds to the same payment amount. It would be nice to have a configureble browser widget that would make paying the default amount as bookmarking something or tagging it for delicious.
The troubling thing is that I'd spend a bit on stuff that I'd optionally get for free, but I don't know how much I'd pay for something like the new york times - the "you must register thing" really bugs me (even now, after I registered with a mailinator account to avoid the hassle). I guess I've just gotten used to trying before I buy (thanks torrent people...)