I'm based in the UK.
What i've read up on the matter seems to suggest that I don't need a license unless i'm transmitting money into people's bank accounts.
I'm not sure that this is true. I suspect you might well need a license as you're transmitting money.
It's an interesting idea though as the delay on mtgox is quite large.
I'd be interested in helping with funding too so I'll PM you too.
I'll look over the FSA rules again and seek proper legal advice on whether this may be an issue, but I truly believe it will not be.
Some background:
Previously when I was running a small virtual world hosting provider (think Second Life) I investigated the issue of currency and determined that a license would be required to handle any paying out of my service into a bank account but none is required for currencies that are purely virtual. My service at that time was accepting USD for providing hosting services paid in advance, users would hold a balance with my company and there was a conversion rate of $1USD to 0.25C (C for "credit"). Credits could be traded with other users who could only use them for funding further hosting, giving the currency value by backing it with the ability to host servers.
Now, in the case of "Fast MTGox" (working title for this new idea) I will not even be holding deposits but simply accepting money for a virtual currency (the mtgox USD - this is not "real" USD as mtgox is not a bank). I therefore believe the law to be on my side.
Of course I may be incorrect in my interpretation of the law, in which case i'd be grateful to anyone who points out my error.