Lantronix’s xPrintServer Home Edition ($100) has been released as an alternative for one very specific category of users—people who want to use their prior-generation printers with iOS devices so badly that they’re willing to spend as much for an adapter as for a new, low-end AirPrint printer. We count ourselves as part of this group, having purchased pre-AirPrint printers that continue to work just fine, and would cost far more…