I'm not too fussed about being credited as it's mostly work by the Tango artists (special mention to Jakub and Ulisse for the Sony hardware related icons) appearing (took me 2 evenings to do, still), but rather the fact that people don't get the whole story going to a resource website like that one.
No updates, no copyright information, no links to sources.
FYI, the source code is:
- Under the GPL for icons copied from gnome-icon-theme-extras and gnome-icon-theme, as well as the background derived from gnome-backgrounds
- Creative Commons Attribution-ShareAlike 2.5 License for the icons copied from tango-icon-theme and tango-icon-theme-extras
- Composite icons are under the most restrictive license of the icons used as sources
- The left-over icons are under whichever license Sony released their sample theme (unused in the final theme)