About the only system that can do faster than real time is DVCPRO BUT... You need their rather expensive decks and something at the other end that can handle the data rate. Outside of ENG I cannot see much use that would justify the cost and I've never run into anyone that's even tried to get it work much less made it work.
OR
If you know you're not going to need everything on the tape Scenalyser can speed up the process.