Sachin is right. A product is more than a feature list. He may come across as arrogant for pointing to Apple et al. as example of great product but his point really is about experiencing a great product and to duplicate this feeling/experience to his product. For example, the unwrapping experience of an iPod does not show up on a feature list but damm, it feels good to open that box because Apple took the effort to make it seem like you're open a present. He should've point to Google Search as another example of great experience. I remembered my virgin search with Google. Relative to other search engine at the time, Google was insanely fast and relevant. Do you remember? if not Google, there must be some products that you fell in love with, now ask yourself if it was the feature list or the experience that you love. btw, having the right feature set at the right moment is part of experience.

Sachin got nothing to apologize for, Posterous is one of the great product out there. It just works! Go, Posterous!