Cool idea and the end product looks nicely designed/formatted. UK only at the moment—I'd try it out for the US. £1.50 per is nothing, though I'd be willing to pay something like $5 for, say, 10-12 articles in one.
This could be even more cool, if the product had http://teespring.com/ model. I might not need my reading list to be printed, but @rrhoover reading list I would not mind to have in print.
Report
Even better, an API for content websites(think Flipboard, Medium) which enables users to have Flipboard Magazines or Medium Collections to be printed and delivered!!
Sorry for off-topic. Got excited:)
Report
If there are any Personal Paper guys here, I suggest to start with an easy PocketApp export.
There is no email field to be notified. Please notify me when launched :)
Tray.io
Goody
Strikingly