That was so completely awesome. I think Yvonne Craig's Batgirl was my very first girlcrush.
 

Have you ever seen the unaired Batgirl "pilot"? It's only seven minutes long, and was put together before they introduced the character on the show. I'm not sure if it was a test-run for the character, or if they were considering a spin-off, but it's worth a look. I'll post a link to it on YouTube in a minute, and you can see for yourself (assuming you haven't already).