Hotels in UB will take 2 pin or 3 pin plugs, so bring your gadgets and adaptors as necessary. There are lots of cafes with WiFi for blogging and website pimping.
Bring a network-unlocked mobile phone if you want to do media stuff from the steppe. You can buy a Mobicom or GMobile SIM cheaply in UB and may find cell-phone coverage at several points on the Derby, enabling you to make SMS updates using our proprietary Live Tracking gubbins. Mobicom is probably your best bet.
The lower-fi your Derby, the less painful you will find it. If you are absolutely desperate to connect, a good power bank or solar charger should sort you out, even if you don't bring it on the horse.