In reply to climbercool:
I had no problems travelling in and out of Kyrgyzstan visa free via land borders last summer.
As of yesterday, reports of the Tajikistan government stopping the issuing GBAO permits again.
http://www.eurasianet.org/node/73446
This happened last year (for different reasons) just before my trip but I phoned the embassy in London and they gave me one - so it always seems flexible.
The Uzbek embassy in Kyrgyzstan didn't like issuing me a visa more than 3 months in advance in 2011 but we talked them into it and they issued it on the stop.
Do lots of research regarding a Turkmen visa - this is the trickiest and most long winded to get.