Will this roll out allow for sharing dvr media between on HD DVR to another HD DVR?
yes and yes (so excited about this capability). With 2 DVR's and 2 eSATA drives... any set top / DVR in the home could access over 3TB's...
Is there a limit of 2 DVRs? Not that I'm necessarily thinking I need 3, but is the limit 2, 3, 4, more?
Technically the limit is 7... which is a function of the home network technology we use called MoCA... It turns the coax into an IP network....