I think that's pretty sound advice, and different from "drcross" I don't think you'd have told Mark Zuckerbert that his company is not facebook ;-). On a more

I think that's pretty sound advice, and different from "drcross" I don't think you'd have told Mark Zuckerbert that his company is not facebook ;-). On a more serious note: I'd say that from within a startup it's pretty hard to get an unbiased view on ones relation to competitors. So what categories would you recommend for a "realistic evaluation" of ones' company in the world?