I think you can do remote access. The best place to get an answer to your question is here:
Slim Devices forum

I have a Squeezebox 3 hooked to my 990 via digital coax and it sounds great.
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Outlaw 990/7700
SVS 20-39 PC +
SVS MTS-01 towers, MCS-01 center, MBS-01 surrounds
Behringer A500
Samsung PN58A650, DirecTV HR-20 700
Sony CDP-545, Phillips CDR 765
Oppo BDP-93, Panasonic DMR E515
Technics SL-DL5
Squeezebox 3
Remote Harmony One