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We use polycom units for the primary video connection. Some things we have learned along the way:

Your connection is only as good as your weakest link. So, if you have a more powerful unit than the classroom you are connecting to, you will only realize the technology to the level of the weaker unit.
Table top mics with push control are far better than overhead mics in a language classroom. We are much less lecture style than most people think of when outfitting a room. You will want more control over when the mics are opened and closed and at an individual level. 2 students per mic usually works well.
Technology that allows for picture +content is extremely helpful but will only work if both sites have the technology to do this. 
I also HIGHLY recommend getting a Sympodium ID370 interactive pen display. This has been an invaluable tool especially with the LCTLs we teach. It allows the instructor to write or draw and the students at both sites to view it very clearly. Great for teaching stroke order ad definitely takes the learning a step above what the document camera will do. 

We also have a document camera in all of our rooms and a computer that can be broadcast to all connected classrooms. The cameras we have include an instructor and a student camera and mics for all. The instructor needs a cordless lapel mic so that she/he can move around the room. 

Mike, let me know what more you need and how specific you want it. We have been using this in our hybrid courses in Arabic, Chinese, Japanese and Russian for 14 years working with 9-10 campuses per semester, 15 courses and serving over 300 students each semester. Let me know how/if I can help.

Lauren 

Lauren Rosen
Collaborative Language Program
University of Wisconsin
618 Van Hise Hall
1220 Linden Drive
Madison, WI  53706

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608-262-4066 (voice)
608-265-3892 (fax)
http://www.uwosh.edu/programs/clp/

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