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The site seems to be using the email discussing method I recommend the implementation of IRC It is easier, faster and can get more freely than using email, or get both stay.
I mean, an independant chat for every category for example #elinux_software #elinux_hardware etc. for better management in information sorting (might find some useful infos too)
Well, there are already lots of channels dedicated to both. For example #beagle. But I believe one central channel where everyone congregates increases your chance of finding someone with knowledge about whatever it is you're interested in. This also allows others to chime in and/or just follow specific chats to learn. There's also many mailing lists out there as well as bugs.elinux.org.