What kind of "technical advice" are you seeking? Without knowing that, we can't guide your search. For all I know, a site like the Macrumors forums would be what you're looking for.
Well, people post questions here about iOS devices, and that site DOES have a section for devices alternative to iOS device.
As for the content you're looking for, some of that can be found in device-specific sections here. If the device is popular enough, there's a decent amount of traffic related to that.