RickeG,
I have been performing with BIAB for quite some time. I am a Woodwind Player and use BIAB as I play Soprano, Tenor Sax, Clarinet and Flute. I have tracks put together so that I use Singers and vocalists find it easy to sing along with my BIAB tracks. This setup has been quite successful for me. Although I play often in a Live Jazz Trio, the small BIAB setup has a place for live performances. These performances consist of BIAB and me, or an additional singer.

I also use the computer keyboard in the "Thru" mode to play small solos with other Midi sounds on the computer keyboard. I use the Standard BIAB software with a hardware synth Module attached via a USB cable to my laptop. The Hardware synth box takes the strain off of the laptop and works better for me than an software synth package.

You can sample my setup at:
http://www.lbentertainment.net/music.php
I hope this is helpful.
lb