I have had the same issues. This is an excellent custom font plugin with many very impressive features, but has two relatively simple bugs that prevent it from being useful:
In the source of the FontMeister Fonts tool, this incorrect path is found:
The correct path to the associated stylsheet is:
This error, of course, causes the sample text in the FontMeister Fonts tool to display in the default serif font, instead of the Anagram font.
The FontMeister Fonts do display as options in TinyMCE's [Font Family] dropdown, and do apply as:
<p><span style="font-family: AnagramRegular;">…or something like this:</span></p>
But there is no associated stylesheet is added the source of the sample page to define the font:
Testing was done in the 2012 Theme, with permissions that work with over 100 other plugins.
Please let me know if you can find the time to fix these bugs, as I would love to make this plugin one of my regular design tools.