Is there such a thing as an (preferably Android) tablet with a PCMCIA slot that I can plug in a wireless network card in? Ideally with no wireless built in otherwise. I prefer Android because then I wouldn't need to learn a new programming language and convert thousands of lines of existing code, but ultimately the PCMCIA wireless ability takes precedence.
Google hasn't been exactly helpful, I imagine it's not exactly a common thing (if it even exists).
My first bet is possibly one of those older converting laptops - I know HP used to do a pretty good one. It'd be running XP / Win7, but would have a PCMCIA slot.
did some quick googling and found this thing: http://www.sears.com/shc/s/p_10153_12605_SPM5974106308P?prdNo=3 no clue how bad it is, uses a really slow via cpu, and can't figure out who even makes it. the description lists pcmcia, but if it actually has it would be a gamble.
but the form factor for tablets is getting so thin that they just can't include pcmcia anymore, a few of the "converter" type laptops made for business have them.
Toshiba Portege's , Lenovo X series , Fujitsu LifeBook's would be a place to start looking at least.
Another thing you might check is doing it in software, maybe? If there's an Android network driver that supports this which you can install on a rooted device or something.
I think you and your boss may be better served figuring out what PCMCIA functionality he needs and how to replace it with an SD/USB implementation, because tablets are "sexy and what the kids like" but compromised, niche, cheap hardware are not.