For over a year now, I've been wanting to design and sell an Ethernet card for the Amiga 2000/3000/4000 and 1200. Recently, an Ariadne II card sold on eBay for US $122, and I regularly see them sell for over $75.
The Ariadne II card is quite basic, and uses a bog-standard QFP100 Realtek RTL8019AS with a PLD for glue logic interfacing to the Zorro bus.
If there were interest in 25-50 of them, I would genuinely be motivated to work on a new clone based on the RTL8019 or possibly the RTL8029. Since there's already a SANA II driver, I would not need to write a new driver for it, thus significantly accelerating development time. I'd also like to get it to be usable via the A1200 clockport, so you wouldn't necessarily have to tie up the PCMCIA port (a pain in an A1200 tower) or could use other peripheral cards, such as SCSI II.
What do you all think? The target price would be under $75, with Zorro cards to be produced first, since there's the least amount of choice/viable options here.
http://www.nightfallcrew.com/?p=1218 and
http://amiga.resource.cx/exp/search.pl?product=ariadne#ariadne2 for more info/photos.