A brief break from email and startup posts for a grammar nit post.
It's quite irritating to me to see smart people constantly misusing "it's" in place of "its" like Fred Wilson did when he wrote "it's users can and will leave" regarding Facebook. This may well be a total anomaly for Fred; I'm just picking on him because he happened to be the third or fourth sharp blogger I've noticed do this in the last few days.
I'm a big fan of informality in blog posts and write tons of run-on and otherwise crappy sentences in my blog posts. But I still consider it's/its, they're/their/there, and other sloppy grammar mistakes to be below the bar I consider acceptable even in blog posts or emails.
OK, that's all.