Am I jealous of other companies' success? I would be lying if I said no.
Thank you for saying this. I've always wanted to, but feared I'd be called out for it. In public. In fact, I think it's part of what keeps the fire burning inside - that constant hunger to try and figure out why some folks are plain better / more successful at the game, and then trying and internalizing / applying those lessons.
And it can get frustrating when you can't replicate / emulate what others have achieved seemingly easily. As a corollary, this is probably why Jack Dorsey and Dennis Crowley are enigmas unto themselves.
An important aside: Chad, I'm someone who has tracked (and may I add envied) the Notifo story. And I admire the work you've done, from fanout.js, to snagging Paul for a co-founder, to HN for Android, to PicAFight, to GramFrame, to Vorepad........I've found myself in awe of how prolific you've been (and you don't even know me).
It's possible you've been doing one thing too many (because you love APIs and can't keep from tinkering with them). What I'm convinced of, is that you have the talent, the work ethic and an incredible co-founder. All the best, I'm hoping I have to transition back into pure envy real soon.