Hi all
I haven't heard anyone mention the upload speed where the slingbox slings from. That is the most important part.
When I first got mine I had nothing but trouble with the picture quaility on the 67 and 68 and my laptop. the only reason I kept the slingbox is it worked great on the wireless lan. Anyway it turned out I had a problem with the actual cable running between the poles two doors away from my house. Long story short even throught dslreports showed me 400kbs upload it was intermittent and the slingplayer didn't work. now its all fixed and I get around 1meg up consistantly.
bottom line you need at lest 512k upload according to slingmedia if you don't have that it will work for crap if you have that or better it will work great at any download speed 200k or more either on mogul or laptop.

thats what I think I hope it helps