Higher Lawvere theories?

Has anyone worked out the details of "higher Lawvere theories" so that one can say "the free bicategory on this object, these morphisms, these 2-morphisms, modulo these equations of 2-morphisms"? -- Mike Stay - metaweta@gmail.com http://www.cs.auckland.ac.nz/~mike http://reperiendi.wordpress.com [For admin and other information see: http://www.mta.ca/~cat-dist/ ]