@ punkyclown
No problems here with my RapidRoad USB on my 1200 via the clockport BUT on my A4000 I've had no luck at all getting it working with my X-Surf100 and there are many other A4000 users with the same issue so beware
I thought this was due to certain models of processor cards in the A4K? Either way, +1 for the RapidRoad, works flawlessly in my A2000 with X-Surf 100. Supports nearly every device I throw at it. 
Yes. I had the problem with my new A4000D and coming to find out it has one of the older 3640s.
Information on the
RapidRoad here, and the latest driver is down in the page with
this link under "Software Downloads." Fixed me right up. Oh, so it says it requires
Thor's mmu.library.
I fekken love my X-Surf 100 and RapidRoad. The only thing which prevents it from replacing my Deneb is the lack of FlashROM (oh, and the number of USB ports: two for the RR and either three or four for the Deneb of which I make judicious use.)