What is the best medium for sending feature requests? Both for Ubuntu as a whole and individual (supported) apps?
For individual apps, the best way is not Brainstorm, but filing a bug requests or feature request in the individual applications.
Some upstream development portals might be having explicit feature for asking user ideas but most of them use their bug tracker for that.
Example, you want a new feature in
Or before filing bugs for wishlist, you might want to talk to the devs of the particular application. You can look at their mailing list or IRC channel.
For Ubuntu, as Octavian mentioned Brainstorm is supposed to be a good platform, but sadly most of the ideas are neglected.
Recently Canonical CTO Matt Zimmerman mentioned that