Andrew Dieffenbach is working on a 128 kB cartridge for the Commodore C64. For his cartridge he uses a 27C010 EPROM with bank-switching for the access of several 8 kB banks of data. In the demonstration video you can see the game M.U.L.E. The loading time of M.U.L.E. is reduced from 7 minutes to 1 second. After loading the first part of the game, the cartridge switches to another bank, and the second part of the game is available.
More information about Andrew's projects.