First of all, great thanks for confinue working under compatibility with Unix basics!
I was _very_ pleased finding this feature (display of user-allowed (option 'user')) mount points in thunar's device list) in Thunar-1.6.2.

But also I've find one miss.
$ grep user /etc/fstab:
...
/dev/cdrom		/mnt/cdrom	iso9660		noauto,user,mode=0444	0 0
/dev/sdb1		/mnt/usbflash	vfat		fmask=113,noauto,user,utf8=1	0 0
//file-server.mydomain.ru/share	/mnt/netbios-name/share	cifs	rw,user=myusername,password=secret       0 0
...

For listed items make thunar display three "devices":
cdrom, usbflash and share.

Although only two of them are user-mountable.
It will be good, if thunar will differ 'user' option as permission for unprivilledged user to mount device and 'user=name' auth option, listing in device list only first ones.