10-Gigabit ethernet questions

Hi:

I've been thinking about the 10-gigabit products Myricom is developing and 
I have questions that I was hoping might be answerable.

1) Myricom is selling the cards, but what switches are these cards for?

2) The software to support these cards currently is released as a beta 
test. Is the software stable for long-term performance?

3) The performance tests were executed using two nodes, each with two 
dual-core Opterons. Have any performance tests been performed in any 
topology other than two nodes hooked directly to each other?

Thanks!

Dan Strahs