There is the SB Audigy 2 NX with 8+2 channels.
(You didn't mention any quality constraints. ;-)
hehe :) .
I have some synth, most are rackmounts and I have a 28 channel mixer in
it (8 Mono, 6 Stereo and 4 simple Stereo ins). Almost all ports are
used, I could even have some more.
Some day I want to replace this rack by a fast while lightweight audio
device which offers a similar amount of ins. OK, I also have rack
devices I don't really use often (like my Microwave I) but sometimes I
want to have some fun with it :) .
So I'd like to see a 20 or 30 ins and 8 outs device instead of 2 ins and
8 outs :) .
Best regards
ce