Social media is making serious inroads as a marketing tool in banking. ANZ's managing director of commercial and business banking in Australia, Mark Whelan, said his business unit was putting 50 per cent of its marketing spend into social media campaigns.Whelan said the bank's business customers were also getting into it, especially companies looking for opportunities in overseas markets."One way to get the word out about your product is to use social media, especially if you want to be noticed in Asia," Whelan said."It comes with challenges but we are encouraging our business customers to do it."Whelan was on a panel at a business lunch in Sydney yesterday, discussing opportunities in Asia.Economist Tim Harcourt said one of the gripes from the Asian end was that Australians were happy to export but were not committing capital to help Asian countries develop their economies.Harcourt said: "I see it as a progression from rocks and crops, which is where we are now. Capital will follow trade."Whelan said capital flows had been held up by the constraints in Asian capital markets. However, Asian countries were opening up. "Companies worry about putting their money into some countries. That will change," he said.