Blogging this for my convenience, but in case you find it useful too…
U – post a tweet (update)
R – reply to tweet / person you are viewing
K – reply to all
D – send direct message to author of tweet you are viewing (unlike R, this doesn’t work when viewing a person)
L- retweet
F – follow the sender of tweet / person who you are viewing
Z – email the tweet you are viewing
V – favourite a tweet
S – go to search screen
A – go to accounts screen
P – refresh
T – go to top of time line
B – go to bottom of time line
(Other shortcuts which I don’t use: E also does reply, Space – page down, Shift Space or zero – page up, O also does refresh and Shift X – exit)
If you’re not familiar with UberTwitter, it’s a great Twitter client for Blackberries which you can get from here.
Keep up with the latest news and analysis
about the Liberal Democrats with my
free monthly email newsletter.
I scour hundreds of blogs and dozens of media outlets for the best news and analysis - so you don't have to. It's completely free and you can leave the list at any time. So why not give it a try today?
You might also be interested in...

I didn’t know any of this! You are truly brilliant. Thank you.
Need a “delete” key please!
@Revmoon press "P". Here's a list of shortcuts. http://bit.ly/ab1ual