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Gateways exist now.
These tend to go through much effort to make FidoNet look as much like Internet as possible. As of this writing, about 25 uucp gateways are scattered around FidoNet. It is used to gate a fairly localized cluster of mainframes to FidoNet at a single point, and has made special arrangements for further routing and forwarding of mail. The MS-DOS system uses Binkley or another FidoNet mailer handles the protocol transfers to make the WWIV system look like a FidoNet system to other FidoNet nodes. WWIVnet gates are said to be scattered around the US and Canada.