It converts a PDA into a terrific ground navigator. But for purely aviation use, we still think dedicated portables edge it out.

TeleType’s PDA-based map program uses a ûself-contained GPS receiver in a PCMCIA slot ûin the iPAQ’s expansion jacket.

Not so long ago—before the Internet bubble shriveled to the size of a dry pea—one technology buzzword making the rounds was “convergence.” The term described a nice tidy theory that explained how cellphones, VCRs, computers, pagers, scanners and televisions would eventually merge into one clever handheld device that would, of course, always be one software revision away from working at all, let alone well.Convergence seems to have smacked up against the fact that when you think about it, few of us want to surf the Web while watching TV, IMing and awaiting a fax from the office. It’s easier to do one thing at a time, thanks. …