Here's my setup. Time Capsule--->Express (joined wirelessly)--->Mac Mini, Macbook Air and 2 iPhone 4 (all connected by WiFi) My problem is my Mini won't stay connected to the 5ghz frequency. Is there any way to "force" it to connect to the 5ghz? Also, I tried to set my network to "n" only using radio mode 802.11n (5ghz) - 802.11 (2.4ghz) but when my brother and wife come over they can't connect their iPhones to my Guest network because they have a 3g and 3gs. So I set it back to Automatic radio mode that it was set to when I first got the TC. I have seen where some have said to make a separate 5ghz and 2.4ghz network, but I use my iPhone as a iTunes remote and for AirTunes and since the iPhone can't connect to the 5ghz network it wouldn't work as such would it? Anyone have any suggestions or know of a setting i"m over looking?