FON faq and some possible solution.

1. Some website can not be accessed via domain name : I'm sorry, but this problem have NO solution yet. Since FON's concept of authorization is involved its static DNS(what a "merely" hell idea ='( ), this problem can't be fix in a few further days(Let's hope their DNS update its database more frequently, but it is not easy). Maybe next generation of FON will use gateway served as authorization instead of DNS, but it will change entire FON network system. Therefore, lets pray and wait.
2. WPA2 encryption is not compatible for some older wireless network adapter : That's no problem at all, you can change setting to adjust it from WPA2 to WEP/WPA, which provide more compatibility to these older adapter. Indeed, disable the encryption is another solution, but it's REALLY not recommended. Also, don't try to tune other part up in wireless page if you don't know what you are doing... serious =P
3. Some problem occurs when access via encrypted private SSID : The source of this problem is complicated, it seems(I guess =P) involved its DHCP time-out. The authorization/encryption mechanism have some problem, even you are authorized, it seems will NOT tell your network adapter about it, but still tell its build-in DHCP server. DHCP server will time out, and fail to distribute IP to you, then you will see your right-bottom wireless network icon tell you "This device have only limited ability to access network" because it failed to get a IP from DHCP. Just push that message upon the icon down, and press "Fix it" button, use Windows build-in tool to fix it and it will be corrected. If you seems disconnected but the icon have no warning, just right-mouse-button click it, select "Fix the device", let it request a IP from DHCP, and it will be all right. Maybe in public SSID somebody will meet this issue(I don't think so, but who can assure? =P), maybe this is also a solution, too.
4. Difficulty in setting up AP location in FON map : There is no easy way, just be patient lol. The more precise you set, the more useful of FON map. Please, be patient, you need only to endure this fuzzy system ONCE.