I will pay even more ($30/year) if Instapaper could somehow allow for cross-browser bookmark syncing a la XMarks. It seems like once XMarks is gone, there will be a huge void in the market. Maybe Instapaper can add some more features to fill in this gap.
As-is, Instapaper isn't a bookmarking service, though. Its a reading service. It strips away the unnecessary crap and formats text nicely, so you can focus on reading.
Many people seem to be mistaking Instapaper for bookmarking. I get "why should I use historious over Instapaper?" a lot, even though one is a "to read" list and the other is a bookmarking service.
Ironically, I also get "why should I pay for historious when Instapaper is free?" a lot as well. Looks like I'll be getting that less often now...
