I would contact the author and suggest LGPL, which allows you to incorporate the LGPL code into commercial applications without affecting the commercial app.
Except for the requirement to dynamically link with LGPL code or provide your application in a form where it can be relinked with system tools.
The Mozilla Public License is a good license for code which you want to make open source but you also want to allow to be linked directly into closed source programs. That's the license used by PAR's libprc, for example.
-- Ben Combee, DTS technical lead, PalmSource, Inc. Read "Combee on Palm OS" at http://palmos.combee.net/
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