@apfusertoo:
I am really hoping for a non-anecdotal, authoritative "THIS is the card we all know is THE ONE" but if I cannot get that, I will try this one.
There are some reasons why this is not possble now and probably won't be possible for some years:
1. Some suppliers change the chipsets used in their cards without changing the model number. In such a case one particular revision of the card might use a supported chipset while another revision might use an unsupported chipset.
2. Some chipset suppliers don't provide open access to programming data for their chipsets making it very difficult to write open source device drivers.
3. The FreeBSD kernel developer community seems considerably smaller than the linux kernel developer community so there are fewer people to write new device drivers or port device drivers from other open source operating systems.