I just came across this and thought it was great: http://www.jott.com/JottInAction.aspx
You call an 800# that you have in speed dial, then you record a to-do item for yourself or others, then it is sent to your inbox (or theirs). Best of all, it's free.
I know some of you mentioned some cool calendar sites you were using at the conference. Those might be fun to share. Also, any cool BlackBerry apps would be great.