Today I found interesting post on www.tipmonkies.com about keyboard shortcuts for wordpress.

This also depends on the browser and also your own created shortcuts.
Some of them might not work some will. Try it!

Bold: Alt+SHIFT+b
Italics: Alt+SHIFT+i
Link: Alt+SHIFT+a
Blockquote: Alt+SHIFT+q
Code: Alt+SHIFT+c
Read More: Alt+SHIFT+tUnordered List (ul): Alt+SHIFT+u
Ordered List (ol): Alt+SHIFT+o
List Item (li): Alt+SHIFT+l