[ocicat]

Originally Posted by LordZ

I would like to know which wi-fi cards I can use to transform my OpenBSD router into a wi-fi AP...

• The first place to search & study is the hardware compatibility list:
  
  http://openbsd.org/i386.html
• Once you have identified the chipset desired, searching the archives of the misc@ mailing list will be invaluable in finding other people's experiences:
  
  http://marc.info/?l=openbsd-misc&r=1&w=2
• Last, but not least, study the manpage for the associated driver. Here, you will find configuration information.