Epson, and Apple, both have the drivers for most printers for both OS 9.x and 10.1.x now. I just plug in the C80 (via USB for now) to my TiBook and go and print. I was a little disappointed that Epson didn't have the drivers ready immediately, but I believe that they got the OS X 10.1 build a little late. They did work pretty hard to get the drivers out, and they work really well. I haven't had any problems using the C80 under either OS 9.x or 10.1.x. I have been considering getting the external ethernet print server, but need to contact Epson to make sure that once it is set up, I will be able to print that way from withing OS X. They don't have the configuration utility for OS X, but they do for 9.x (as well as window$).
I don't really have a burning need to get the external print server at this point, since I have a buyer for my G4 tower. Once I get the replacement tower (after MWNY), then I will decide about that item. I hope by then, that Epson also has the wireless print server available for sale as a seperate item (would make my C80 into the C80WN model). I just need to decide which I would use more, the wired or wireless part. There is the benefit of being anywhere with the wireless, but then again, I have the airport base station that can act as the bridge (also have a network switch to plug everything else into).
Decisions, decisions, decisions.... 😀