|”If you had in-place purchase flows, do you think |users would feel comfortable entering the credit |card?”

not normally, not now. but ideally, we will eventually get to that point where your one-click purchase is a web-wide standard, not just a site-wide feature (ie. amazon.com).
whether or not is is client(web browser) or cloud based… or a mix… we’ll see.
i do anticipate there being a “pay with twitter” in the mix. maybe sooner than later. wouldnt still have some bouncing back and forth pay-pal style though. but i know its possible to do cross-domain ajax. ive done it with flash, javascript and a crossdomain.xml setup. i also know that as part of the html5 draft, it is achievable through supporting browsers, natively.

so we should see improvements in this area.
and when we do, everyone wins.

sull