Learn Buzz's Keyboard Shortcuts and Direct Message Syntax [Shortcuts]

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Now that Google's Buzz social network has learned from its mistakes, more users might be keen on actually giving it a go. The Google Operating System blog has a great power user's guide to the finer points of Buzz.
Being the nerdy productive/ergonomic types we are, we immediately jumped to Alex's roundup of the keyboard shortcuts you can use while moving around inside your Buzz inbox inside Gmail. They fit fairly snug inside the Google shortcuts you already know:

Shift+l - like a message
m - mute (ignore) a conversation
r - add a comment
p / n - go to the newer / older conversation
o - expand conversation
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The post also details how to send a direct message to another Buzz user (i.e. Gmail contact), how to search and find messages, Google-Wave-style (authorgmail.com), and how to import third-party sites and your own feeds into Buzz.
What features have you discovered in Buzz that let you look beyond last weeks' privacy faux pas? Or does Buzz still not feel like it's worth your time and attention yet? Dish it out in the comments.
Google Buzz Tips [Google Operating System]

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