Xero has issued a press release that it has topped $100 million Australian in annualized revenue. That's based on the monthly subscription rate for May and shows Xero trending up around 42 percent from the actual revenue reported for the year ended March 31. Other than demonstrating the importance we attach to the base 10 numbering system (100 is ten 10s, right?), it triggered a thought that has been rolling about for some time. (It's about $93 million U.S.) In earnings webcast, NetSuite CEO Zach Nelson points out how few financial midmarket cloud companies exist.