Ask HN: What do you want most from webmail?

Labels/folders, no ads would be awesome, IMAP (and Push) is exceptional.

I'd like to see everyone implementing Gmail's "conversation" layout but not taking it to other level—making email look like chat, that is.

Plus, I'd like the feature to export all of my emails from one account whether it's Gmail or Yahoo, etc.

Unless you have ideas that are as big as that you probably shouldn't bother stepping into the ring. The product quality bar is very high and so is the lock-in for email (Yahoo/Hotmail are still bigger than Gmail).