In this paper we present a new environment for supporting Web user interface migration through different modalities. The goal is to furnish user interfaces that are able to migrate across different devices offering different interaction modalities, in such a way as to support task continuity for the mobile user. This is obtained through a number of transformations that exploit logical descriptions of the user interfaces to be handled. The new migration environment makes use of service discovery both for the automatic discovery of client devices and for the dynamic composition of the software services required to perform a migration request.