there is a way you can import/export - you just need ifunbox on your PC - there you can delve into the ipad's file system , and find the FXP files (and presumably copy your own into there too although i haven't tried that yet)
User Applications/Z3TA+/Application Support/z3ta/Programs
stupid that you need to use this workaround though - all other synths on my ipad can share files via itunes