First, regards the "there's no copyright", check what you just bought. There is copyright in virtually anything written or expressively created since ~1914 (give or take a few years). And it persists at least 90 years, up to 90 years after the author's death. What may have changed here is that you own the copyright. Or not. You must establish this before considering any action.

For the "what license" part of your question. Note that copyright in computer fonts applies to the programming involved in generating the shapes and hints. Font faces themselves can't be copyrighted, and there's probably caselaw to back up that statement.

If you want 'em free and only free, the obvious choice is the GNU GPL. If you want 'em free but freely useable whatever, then an MIT/X11/BSD license (without the advertising clause, please), is useful.

I'd strongly encourage you to take a look at the new licenses put out by the OSI, the [link|http://www.opensource.org/licenses/osl.php|OSL] (open software license) and [link|http://www.opensource.org/licenses/academic.php|AFL] (academic free license). Both licenses include some really cool anti-patent termination language. The OSL is an analog of the GPL, the AFL an analog of the BSD/MIT license (note that this is a general description, the legal specifics vary considerably).

Dual licensing is also a possibility. Notably, the option of dualing under the OSI OSL & GNU GPL, though I'm not sure that this wouldn't affect the strength of the OSL's patent protection negatively. But it's something to consider.

IANAL, TINLA, YADA