This will only work on servers that display a message on how many people are queued for a BG every time someone joins the queue.
You will need 2 macros:
Code:
/click HonorFrameSoloQueueButton
Code:
/click QueueStatusMinimapButton
/click DropDownList1Button2
Put both on your spellbar where you can easily spam the 2 macros back and forth.
Enjoy 
This was tested by me on ATGwow 5.4.8 server
To make this more efficient use an auto key presser or mouse clicker and set the intervals to low, around 100 milliseconds.