Apologies if this has already been asked...
Can I set up two accounts at mtgox?
I already have one in GBP (i'm from UK) which I have some longish term investments in..
I now want one to day trade in USD...
Can i have two accounts linked, or will I have to set up an entire new fresh one (and can i have two accounts under my name?)
A single account can have a wallet in each currency. Simply click the icon for which currency wallet to use.
To transfer funds from GBP to USD or vice-versa is as easy as buying bitcoins with one and selling in the second currency.
Mt. Gox terms prohibit multiple login accounts, and since they can ask for AML verification at any time, it is not recommended that you chance it just because they allow small value accounts without verification.