There have been a lot of attempts over the past 5 years, or so, to design a micromouse robot equipped with a venturi fan. The basic idea is to use the fan's suction to sustain wheel traction at the high speeds achieved by the top robots. Even David Otten from MIT attempted it with very limited success.
Finally at the All Japan Micromouse Robot 2010 competition this November we saw a fan equipped robot turn in competitive speed run times. Although it didn't win the championship, at least not this time around, the Micesweeper robot did capture 4th place with a speed run officially clocked at 4.942 seconds. According the designer's analysis, the robot achieved a speed on the straight runs of 3.0 m/sec, did 90 & 45 degree turns at 1.8 m/sec, made 180 degree u-turns at 1.6 m/sec, and accelerated at 9.8m/ss. Very cool.
Of course you can't rest on your laurels. Now he's tuning up and refining the design.
Fan traction demonstration:
December speed run: