It's hard not to love Marco. He's a one man band that manages to keep up a killer product, maintain an active presence in the community and he's innovated on Instapaper in a good way. I use it every day.
I love Instapaper, and always find what he has to say interesting, but it baffles me that every one of his blog posts seems to reach the front page of HN almost immediately. It makes me wonder if people wait for RSS notifications of his entries and then jump to be the first to post it and get the guaranteed karma bump.
Please, no :( Apple has a long history of building their own product based on what's already in the market, ad they rarely bother to acquire the developer who originally thought of the idea. I wouldn't want Marco to suffer that fate.
1. It just works - I have never encountered an issue with the bookmarklet not formatting an article correctly.
2. Day vs. night mode. You can configure it to automatically switch to white text on a black background at night.
3. Performance - even with 100+ articles the app doesn't slow down and downloads new articles in seconds. Switching between articles and scrolling long articles is liquid smooth.
Overall, you can tell just by using it that a ton of thought was put into the UI.
I agree that instapaper is fantastic, but the article formatting only works for me about 95% of the time. There seem to be some sites that it occasionally gets wrong in a really annoying way (like including some odd dump of the site's sidebar that requires you to finger-swipe for about 5-10 seconds on an iPod to get to the article contents, which are of course easy to speed by).
