Email me through the Adventure Unicyclist website. I'll put you on the mailing list.
In terms of requirements, you have to get yourself (and unicycle) to Tashkent on the 21 Oct 2013. Once there everything is taken care of- you just have to ride! It's a supported unitour, so achievable for most unicyclists.
Accomodation, most meals and carting your gear are all provided. There is a support crew and support vehicles- people jump in them if they are struggling, or if they get injured/fall sick. We have regular rest stops where the unicyclists regroup. However, the fitter you are, the more you will enjoy it...nobody likes riding in the support bus.