The Prisoner DVD's are pretty good but relatively expensive. I got the first two volumes, but that was before whole seasons of TV shows were being released on DVD, so each set of 3 or 4 episodes was around $40. Now for 1.5 to 2.0 times that, you can get 22 to 26 episodes of more recent shows. Now that I'm buying seasons of Buffy and plan to buy seasons of B5, purchasing the rest of The Prisoner is on my back burner.
Anyway, I haven't seen the last episode that everyone's describing, but I did happen to see a graphic novel that told the story of Number Six several decades after the final episode. I only skimmed thru it, but even it looked a little abstract.
I've seen some rumors on the internet that they might do a feature film of The Prisoner, but the general concensus from fans seems to be that it won't be the same without using the same site as the original (I think Portmeiron, Wales--pretty positive I'm spelling that wrong and maybe even leaving out a syllable).