The following is a paid review, but is 100% honest:
Need fonts for your skins? Don't want to pay for them? Good! Then you probably know that doing a Google search for "free fonts" results in, well, a lot of not-so-good results. It's rare to find a high quality, free font site.
That's why I was very glad to be introduced to UrbanFonts. The site features well over 6,000 free fonts, which you can browse alphabetically or by category (a good place to start might be with the famous fonts). You can also view the most popular fonts, the newest fonts, or the site owners' favorite fonts. Every font features a live preview capability, where you can type in any text you like and see what it looks like in a given font, before you download it. You can also change the color of the font. Very, very useful for quickly and easily finding the perfect font.
So many of the users of BlogSkins live in different countries, and speak languages other than English. For you, the foreign language fonts could be extremely valuable. Patriotic Americans would probably enjoy the USA fonts. Or if you have a specific font in mind, try the global search or browse the list alphabetically.
For those of you who are font/design nerds, there's a font blog where interesting (I guess ;-)) facts and information about fonts are discussed.
And of course, for when you get really, really serious, the site has a good collection of fonts you can buy.
So go out there, find and download yourself some high-quality free fonts, create some killer skins, and submit them to BlogSkins.