[LAU] multichannel interface recommendations?

[Studio Channing]

we are searching for a new audio interface for a project studio and 
interested in the experiences others have had

requirements are:

* 8 (or more) channels simultaneous recording to computer

* at least 4 preamps for mic level inputs

* USB2 preferable to Fireware, but..

* 100% linux compatible, ideally with a stock kernel

* under $500 USD if possible

less important is real-time monitoring functionality - this will mostly 
be used for bands playing live

there are several new inexpensive USB2.0 interfaces that would 
apparently fit the bill if supported under linux but it is not clear if 
they are, seems like in contrast to FW most are not

anybody have any recommendations?