As promised by Epson couple of weeks ago, the new Leopard-compatible drivers are now available from the following website: http://esupport.epson-europe.com
You might have to look around for the proper drivers as the page does not include them all. For example, the driver for the RX560 is available from this link: "http://esupport.epson-europe.comUU003D.
It seems that drivers designed for Tiger are still working with Leopard, if one re-installs them following Leopard. The only bug we could notice is a mix between languages (here French and English) in the printing interface. If you own an EOL Epson printer