Blend 3 allows you to embed fonts, but unfortunately if you publish your work online you are technically distributing the font. Learn how to cope with this problem in the post of Gavin Wignall.
However, there is a way around this, if you encrypt the font so that it is not usable then you are arguably not distributing it any more. This process is known as Obfuscation. It is important, however, to point out that you still need a license or permission to use a non-standard font in your work.