I just tried cifs.ko compiled by Matan and that worked flawlessly.

mounted using

mount -t cifs -o username= //server_ip/share /home/user/MyDocs/mnt

I know I should use /mnt but that was not visible in the N900 filebrowser and symbolic links wont work under FAT.

Tested some media and it went great.

Unmounting is simple just use

umount /home/user/MyDocs/mnt