I was a single founder. Small side projects that I can do while working I don't see a need for two people. I'm able to run and experiment with ways to grow my side project at a casual pace. For a product that takes a full-time effort, it's extremely difficult and emotionally draining to do on ones own.
A dagger through my heart! Actually AtD consists of three technologies: spell checking, statistical misused word detection, and a rule engine for grammar/style rules. I expect the Google Wave spell checker is *very* similar to AtD's statistical misused word detection. We both take a simple model / lots of data approach to solving these problems. I won't say one is better than the other because I can't measure from a video, but knowing how these technologies work, I can at least make the assumption that we're in the same league.
Hey, nice spellcheck on the comment form. :) I'm no good at keeping AtD-related secrets, so I'll just say... AtD/ID is built on top of a AtD/jQuery API that makes adding AtD to any textarea trivial. It also does cross-domain AJAX so there is no excuse. I plan to release it after we see how the AtD/ID plugin does and fix any bugs there. Thanks for the write up!
I know what's causing that bug you just mentioned. The highlighting is a regex replace (sorta, it's smarter than just a straight replace, but not by much) and AtD is contained in the links that are made by AtD. I'll address this.
Thanks for the feedback. We listen. :)