Like the expression, "I'm all ears" juiced up for the Internet.
To be used in e-mails and mostly text or instant messaging and chat.
I am ready, willing and able to read what it is you are typing.
All my attention is on what you are typing.
Original saying was "I'm all right Jack, pull up the ladder".
Meaning when a man had got safely on board ship by climbing the ladder from the sea or from a lifeboat, don't bother about saving the rest of the guys because I don't really care about them.