Great freeware fonts for PathTextBlock and Silverlight
So you want to use PathTextBlock but you don't want to worry about font licensing. It's important to note that even the fonts that come standard with Silverlight 2 are not licensed to be encoded and packaged in a XAP file, so you can't just encode Arial and use it with PathTextBlock.
What you can do, however, is go to the Absolute Fonts Archive at http://www.grsites.com/archive/fonts/ and find a font to use. All of the fonts on the Absolute Fonts Archive are "freely distributable", from the Absolute Fonts Archive disclaimer:
Disclaimer: Fonts found on this site were not created by the webmaster. They were obtained from various sources on the internet that labeled them as "freely distributable". If you should discover fonts in this collection which you recognize as copyrighted, please email the webmaster immediately so that they may be removed.
These fonts can also be useful if you want to embed a custom font for TextBlock or TextBox in your Silverlight application. There are about 6800 fonts available so you should be able to find what you need.