FC7-i386
Has anyone got a Epson RX580 working in FC7 using the driver supplied in FC7.
I can get the printer to work on installed driver, but when running
Scanner Tool I get a error message: "No device available"
I have A Epson RX500 and RX600 and both will scan .

I'm not quite sure but that could be the same issue I'm experiencing with an Epson 3850. It turns out that you need to run it as root if you need to make scans (you can also change the permissions, of course, which is the recommended approach).

Has anyone installed the avasys.jp linux scanner driver, iscan-2.8.0-1.c2.i386.rpm , I'm having problems with no scanner.ko module,
and the instruction are awlfully misleading.

If I do "sane-find-scanner" , I get a "found USB scanner (vendor=0x04b8 [EPSON], product=0x0827 [USB2.0 MFP(Hi-Speed)]) at libusb:004:003 "

The problem with permission to run in user was in, /etc/udev/rules.d/60-libsane.rules if your scanner is not in this list it
will cause user not having permission to use device.
If your scanner isn't in this list, you must add in lines as such,

# EPSON Stylus Scan 2500
ATTR{idVendor}=="04b8", ATTR{idProduct}=="0106", SYMLINK+="scanner-%k"

Change the line # EPSON Stylus Scan 2500 to match your scanner.
then on the second line you will have to change, and enter the idVendor
and idProduct numbers for your scanner (numbers in quotes) .

You can find these two numbers by running sane-find-scanner.
In 60-libsane.rules in Konqueror i did a "Find Next" under "Edit" and type in my Product # to see if my scanner was in list and it wasn't.

Jim