"Recon Armor will be earnable for all - complete the Vidmaster Challenge series of achievements and it's yours."
http://nikon.bungie.org/news.html?item=24476
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As of 11.13.2008 2:53 PM PST:
Sketch answers more questions here:
http://nikon.bungie.org/misc/reconclarification.html
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Posted by urk at 11/14/2008 5:45 PM PST:
Bungie Weekly Update: 11/14/08 (excerpt):
• Everyone gets Recon armor for multiplayer!?
Yes, sort of. We did confirm that when Halo 3: Recon is released next Fall, fans will finally have the means to acquire the Recon multiplayer armor for themselves. The “Vidmaster” achievements that were kicked off in the Halo 3 title update a few months ago are the first step on the road to unlocking Recon. Eventually, once you have successfully completed all of the Vidmaster achievements, you will be able to wear the armor. Some of these achievements can be earned when the Mythic Map Pack is released early next year, but you won’t be able to complete the full chain until the retail release of Halo 3: Recon next Fall. So yes, approximately two years after the release of Halo 3, the broader community will finally be able to get their hands on the Recon armor.
[Edited on 11.14.2008 6:42 PM PST]