Short answer: No.
It answers well enough, actually.
Merom is the Core 2 Duo compatible with Core Duo, and therefore the version compatible with the Mac Mini.
Merom only goes up to 2.33GHz. No C2D that isn't merom will work.
The 2.4GHz and 2.66GHz versions are not Merom, but Conroe, and Conroe is not a mobile processor therefore it does not use the same socket therefore it is not pin compatible therefore it won't work in the mac mini..... or something like that.