I really appreciate your work and am looking forward to future updates of your site.
Though, I think 'Designs' in the navigation bar should be relabeled to 'Skins', so it would be more easy to find skins without hovering with the mouse over the navigation bar, but maybe that's me only.
Since I don't know, how you plan to present plugins in future (show compatible Winamp version etc), I can only give the tip, that I would not import ALL Winamp.com Plugins without testing.
E.g. installing the FLAC decoder from Winamp.com over the Nullsoft version will prevent users from using features like the format converter, all features of the library or the unified tag editor. Justin's old out_mp3 crashed for me since Winamp 5.2, if I can remember correctly. Most plugins still work somehow with newer Winamp releases, but some really love it to crash. A few plugins are really so old, that they produce a lot of issues/crashes with recent Winamp Versions, some even don't work correctly with Winamp 2.9x (CD Reader for example).
Don't take it as critics, it's only meant as tip, I've seen a lot of postings in Tech Support because people installed very old plugins from Winamp.com.
Keep on your good work! And if you need help, just lemme know, I will help whenever time allows it.