okay, got it... you're just using the thunderbolt adapter to deal with not having an ExpressCard slot? (my 17" MPB has one, which I use for eSATA so that my samples come in off a different path than where the audio runs (FireWire).
So... good to know... through one of these adapters, I could still run my eSATA card for the samples libs hard disk, although... I'd likely switch that out for something USB3 based, and... get a card that exposes FireWire via ExpressCard, and hook the audio interface to that.
Logic v9.1.8 (64-bit), MainStage v2.2.2 (64-bit), OSX v10.8.2
MacPro 8 core 24GB RAM, 2x 23" Cinema Display
MacMini i7, 16GB RAM
retina MacBookPro, 16 GB RAM
MacBook Pro, 8 GB RAM, MOTU 828, GlyphTech ext drive
MacBook Pro, 6 GB RAM