I'm in Canada and can't use coinbase either. But that's just the site he uses to buy his bitcoins...there are plenty of other exchange sites where you can buy them.
He then sells them on localbitcoins.com, which supports 240 countries. So if you research bitcoin exchange sites in your country you should still be able to use this method.
All in all looks like a pretty solid method.
Looks good on paper but first, coinbase is gettiing the reputation of bring th eNSA of exchanges. They are haulting accounts for selling (as described in the WSO) on localbitcoins.com and for purchasing items deemed unaccaptable to their TOS! Bitstamp might be a better alternative but all of these exchanges have their drawbacks and it is not the quick $100 the author claims, never is! In addition, if you are US, you better consider the tax nightmare this type of arbitrage can cause come tax time. Just my 2 cents, I liked it until I started peeling back the layers! Talk about a red flag for audits, or snooping for money laundering this is it IMHO!
thank you for the share +5 goodness