Shuttleworth: Unity shell will be default desktop in Ubuntu 11.04 (ars technica)

Great point. The "v2+" issue is orthogonal to the "copyright assignment" issue. It should also be noted that GPLv2 is too restrictive to the BSD advocates, so it perhaps shouldn't be shocking that GPLv2+ and GPLv3 are.

A big point to note about the "+" issue is that the "+" ensures forward-compatibility with future GPL releases, i.e. GPLv2 is incompatible with GPLv2+. Perhaps some will see it as a conspiracy from the FSF, but it's arguably a logical consequence of the "no further restrictions" in the GPL that ensure end-user freedom (at the expense of the mid-users' freedom to restrict others' freedom, BSD advocates will note).

The GP has a fair point, however, in that the "+" implies a non-legally-binding trust in the FSF to not go where you don't want them to in future GPL releases, with the benefit of forward-compatibility and the ability to fix "bugs" in the license (e.g. tivoization and the MSFT-NOVL deal; the scare quotes are there because it's clear that not everyone agrees that these are bugs in the license).