I want to find out if the blueSMIRF silver will pair up with another blueSMIRF silver rather than a PC. In other words can I connect two microprocessors together using two blueSMIRF silvers?
They sure can https://cdn.sparkfun.com/assets/e/c/b/1 … 8b4567.png - each module is capable of Bluetooth In/Out, you would simply pair the devices via BT
Our hookup guide https://learn.sparkfun.com/tutorials/us … her-device has an example that covers pairing 2 bluetooth devices 
Will the BlueSmirf Silver module be available again soon???
We do not have plans to continue carrying the SMiRF products (for now); please check out our https://www.sparkfun.com/products/15025 or https://www.sparkfun.com/products/16306 that might suit your needs.
Hope this helps!
I am also interested in either a blueSMIRF or an equivalent (for example, the HC-05 or HC-06). These devices are getting hard to find. Is there an equivalent low cost bluetooth SPP-capable serial communication item somewhere?