GMail makes me feel so good

GMail is the closest I've ever been to email nirvana. Labeling (much like tagging - a la del.icio.us) is more intuitive than foldering emails. The search is fast and sophisticated. I have a system for using my email to Get Things Done, and honestly it is much easier with GMail than it was using a desktop mail program. If I could add a few more things, it would make my GMail life much simpler.

I would like to:

• use keyboard shortcuts for "label" and "remove label."
• define "canned" searches. For example, I want to find all messages having label "a" but not label "b" just by clicking a link.
• use keyboard shortcuts to perform those "canned" searches
• define macros for repetitive operations. For example, I want to remove label "a" and apply label "b" with a menu and/or a keystroke.
• see some statistics - who am I getting the most email from? how much am I writing and to whom?
• group conversations or break up conversations by hand
• find "similar" conversations
• schedule messages to be sent (send myself an alarm later?)