High altitude balloon tracking is an aspect of our hobby I have never tried, although I know some are really into this. As they say, you cannot do everything. ATV is another aspect I have never tried and satellite comms I have only "dabbled" with. Today, Southgate News has a link to an introduction to high altitude ballooning, which is well worth a read if ballooning "floats your boat".
See http://www.daveakerman.com/?p=1732 .
Judging by the comments, this is quite an old post, but worth a read.