I had come across the AF thing before...
* The Disk2FDI software by Vincent Joguin, combined with a second floppy drive. This software works with the most common floppy disk controllers used in industry standard PCs, requiring no custom hardware other than an inexpensive additional PC floppy drive. This is a read-only solution, and currently only supports Windows 95, 98 and Me (not NT, 2000, XP or Server 2003). Disk2FDI is included in Amiga Forever.
* The "Catweasel" floppy controller, by Individual Computers, which is available both as a PCI and as an ISA board (to be mounted inside the PC) to which the disk drive can be connected. The Catweasel is also available for the Amiga, but the one needed here is the PC version. This is a read/write solution which supports all versions of Windows except for Windows NT 4.0 (Windows 95 is supported via DOS software, newer versions of Windows are supported via WDM drivers).
* The "Amiga Floppy Reader" (AFR), designed by Marco Veneri, is an interface which can connect an external Amiga floppy disk to the PC's parallel port. This is a read-only solution with DOS-only software.
Seems nothing will let you get proper (RW) access to amiga floppies. The way I managed it is to put PC floppies ni my Amiga rather than vice versa. Then it is just a matter of crossdos.
If anyone does find a reasonably priced PCI catweasel I would be most interested.