Why hasn't anyone launched a Feedburner competitor since their collapse?
TomOfTTB: I think the money issue is the most pressing.  The way I see it there’s a couple problems.1.  Even though feeds are fairly small and easy to serve there’s got to come a point where you have so many users that even their small feeds begin to cost significant money.  Feedburner not only has to check the host feed often but serve all the subscribers who poll as often as every 5 minutes.  That’s a lot of bandwidth and a lot of server power.2.  With free analytics services all over the place it’s very unlikely you’ll be able to make money on a subscriber model which leaves ads as the only viable revenue stream.  But for that to work you need a decent ad network behind you and you can’t very well use adsenseWith that said, I'd think it a fairly easy service to duplicate.  All Feedburner really does is read your feed and then repackage it while logging the pertinent data from the subscriber http transactions and sticking it in a database.  Since every modern language I can think of has free libraries for reading RSS/Atom feeds and logging transaction data the whole thing could probably be duplicated in a couple days.