Thanks for the reply. Unfortunately despite some time searching I have been unable to find a single card anywhere that matches both specifications. (That is, a card that falls onto the OpenBSD list and also matches the 64bit/33Mhz specification; even the 32bit/66Mhz slot reserved for the video card would be fine, if i'm allowed to use that instead, since I don't need a video card).
I've found many 32 bit cards, but none of them support 66Mhz; and I've found many 32bit/66Mhz or 64bit/33Mhz compatible cards that aren't on the obsd list. Why would the G3 only support a higher-bit rating card considering it's so old? Seems very strange. Should I just disregard these specs and buy a card whose chipset is on the obsd list, or should I disregard the obsd list and find a card that fits the G3 specs?
It seems that you alluded to one of these alternatives in your post, BDAqua, but I'm not sure exactly what you meant. Wouldn't a specifically designed driver be necessary to be installed on OpenBSD for whichever card I get? I.e. if it's not on that list I wouldn't think it would work. But then again I know very little about this so hopefully I am mistaken. Incidentally I wasn't able to find any Realtek NICs that are compatible with the G3 specs as far as I can remember.
Thanks.