Israeli startup Xeround is the latest company to spread its bets across cloud infrastructures, announcing today that Xeround’s database can be run on the Rackspace Cloud. The Rackspace version joins earlier support for Amazon EC2 and Heroku. Xeround’s job is made harder, as they now need to ensure support, updates and feature parity across three underlying infrastructures, but they open themselves up to a far larger pool of potential customers… Having tools like Xeround’s available in more than one cloud also makes life far easier for customers that wish to migrate from one cloud to another, or to run in more than one at a time. Can Xeround and similar companies afford to support all of the available clouds? If they want to attract bigger customers, can they afford not to?