The US iTunes store seems to have a lot more free content than the UK store, but how do you get a US account without a US credit card etc.. ???
Well you either buy a $ voucher (which involves cost) or follow the following which I have found on several websites:-
Step 1: Find a redemption code. The difficult part, but try this link:- http://allhiphop.com/promo/bmm/
17 FREE RnB / Hip Hop tracks so far this month !!
Step 2: Enter the US Store.
Open up iTUNES and make sure you're signed out of your UK account (click your username/email address at the top right, then click sign out). Scroll to the bottom of the page and select United States from the My Store pulldown.
Once the US store has loaded, click Redeem in the menu at the top right below the banner.
Step 3: Use the code.
Paste the code in and click Redeem. You'll get a sign-in request, but click Create Account instead.
Step 4: Create your account.
You'll have to agree to the iTS T&Cs first, then you'll be presented with a payment method screen. However, this time you'll see 'None' as a payment method. Leave that selected and provide a phony address.
Note: if you never plan to download paid content from the iTS, then it doesn't matter what state you choose. If you think you may want to actually buy content at some point, using gift certificates or whatever, then choose a state with no sales tax (e.g Florida). In either case, the city and zip you provide must match. Use a Walmart Address - just google.
Step 5: Start downloading!
Go nuts! There's one or two free songs per week, plus random other stuff. There's a section further down the home page (under Staff Favorites) that lists all the free material.
Search the net for free content or refer here: http://forums.macrumors.com/showthread.php?p=4681832#post4681832
UPDATE: The same principal works for any country, except the code will be for the US only so it wont let you download that item. BUT....it will let you create an account with no payment details and let you access all the other free content for that country.