Likewise I'd like the same basic thing, but ethernet. Unfortunately I think we're both stymied on that one.
Full-blown USB2 transfer rate is something like 320 Mbit/sec for bulk transfers. I'm really not sure what you could connect to your A1200 to get that sort of sustained throughput especially to/from system memory. Your best bet would be a GRexx PCI with some sort of USB2 card fitted, assuming all the necessary drivers exist.
Ideally, someone would bring out a new accelerator card with all this gear on board already. Sort of an all-round accelerator rather than just a faster CPU.
-edit-
Of course, you could argue that's exactly what the NatAmi is, albeit one that doesn't need the rest of your system. 
Hmmm.... despite the fact I grudgingly agree with what you say here...
I'm in cream puff right now over our other wee debacle /debate in that other thread today, so I'm not talking to you today, so there and na na na na na can't hear you (well I know it's really can't read you but that doesn't sound right)...
So stop posting things that agrees with what I say or I'll end up in a bigger sulk and end up spamming the Sky News website and taking it out on those poor journos over there, I gave the poor sods an earbashing yesterday...
So leave me out of things for today as I canny be bothered and I'll just end up peed off and start ranting again about anything and everything...
I'm off to take some of me meds as I've either missed them today or they don't work anymore... or perhaps it's time for a wee stay in the loony bin again...
Anywhoo, I'm going to bile ma heid and see if that helps...
PS: Me bloody useless dog hasn't died today , now I'll need to figure out what wrong with him now...
Feck, I have everyone and everthing....
Oh look a squirrel...
