Best PCMCIA network card for A1200?

[adolescent]

You can go wireless (802.11b) or wired (10Mb Ethernet).  Check out prism2.lha, 3c589.lha, and cnetdevice.lha packages on Aminet for compatible cards.

Myself, I've used all three.  Prism2 with a Netgear MA401, 3c589 with a Megahertz combo card (don't know the part number), and cnetdevice with a Kingston KNE-PC2T.  All performed fine with AmiTCP and Genesis.  Only thing to note is the wireless only supports WEP, so if you're using WPA you should go wired.

[adolescent]

@orb85750

No extra hardware is needed.  In fact, I have my A600 (2M chip) on my home network using AmiTCP and AmigaExplorer to transfer files.  

Of course, you can do a bit more if you have a faster processor and more memory.