I received yesterday the new Fon access point which was bundled to same deal with the SMC WiFi Skype phone. This new version of Fon access points is working perfectly with the phone, so good that I didn't returned it as I was planning.
The new access point seems to be much more well designed than the old Linksys switch / access point. For example this includes two different wireless lans, one which is for the Fon and it's using their authentication. Another is using WPA so I can now use only one physical device since before I needed to have two, one to provide the Fon connection and another with WPA for my own laptops.
Also the configuration is now done in their website and the device is retrieving the configuration changes and upgrades from Fon servers every 24 hours or in every restart.
I will take keep the new access point at home and I'm going to install the old one to our office to offer wider Fon coverage...