@SirCranky is referring to putting 75 mm cranks (and probably a more comfortable seat) on your 20" and try out a couple of 10km rides and longer. (100 km have been done). There is an ongoing discussion about this in the MicroMachines thread.
Micromachining is a fun (and cheap) challenge, but requires some advanced riding skills. (EDIT: I saw from your profile that you are young and play Uni Hockey. I think you should have what it takes to try that out.) It is way harder than just riding a 36er though. A 36er is difficult in the beginning, but once you are comfortable with it, you dont want to ride anything else. 
This is so smooth, fast and feels just great overall. I would highly recommend any unicyclist to just do the leap and get a 36er. I use my 29er for hills, trails and Muni, and my 36er for distance riding (including hills and trails )