I would like to develop a business app for the iPad that calls for a transitional client/server architecture, such that the iPad is talking directly to a Firebird SQL database on a server somewhere. I am not seeing any info about the iPad talking directly to any RDBMS. Is that simply a no-no? If so, how do folks talk directly to a RDBMS, via web services? How do folks sync between a RDBMS and an iPad?