The XE1541 cable works like a charm on my PC, never tried the Amiga solution, Easy1541, though.
The program you use on the PC is nothing but a clone of Norton Commander, very easy to get your disk images into floppies and all that. Straightforward!
Jens: I was "out of the loop" for a while, glad to see you kind of revived the project. Are you selling these disks, if so where?
woops, forgot to say, there's not such an easy solution on teh C64. but the XE1541 cable is easy to build or a jiffy to order, and in seconds you will be set. I suppose you could use an Inspiron to do this (provided it has a parallel port) but there's no OS X solution.
If you do have a 1581, I think there is an Amiga program that can write 1581 disks, so you can transfer a few files. But this is not recommended, it's easier to have your drive connected to a PC and write your disks in Star commander.
If you DON'T havea 1581, don't get it. They are expensive, and lots of software wont run off them.