According to an archived Russian web page (purportedly written by the Russian Strategic Rocket Forces), UVB-76 is used to transfer orders to military personnel, along with the time at which they should be executed. Sample orders are given on this page, which match the format of messages transmitted by the station in the past: 45359 ½ 3749 6335 79992 f 9923 7768 7117 5770 28138 77560151 05515597 76785508 6121 2637 0931 "Words for the radio messages and code tables are selected mainly from the scientific terms of chemistry (Brohman), Geology (ganomatit), philology (Izafat), geography (Bong), Zoology (kariama), history (Scythian), cooking (drying), sports (krolist) and others, as well as rare Russian words (glashatel)."
The page continues to list all 23 transmissions that have been made from the station in the past, showing that UVB-76 may be more active than believed.
Do have to say the though, the one of Boba Fett is definitely my favorite
I really don't see the 1st amendment issue here. The NSL law is troubling for other reasons (prohibition on seeking legal advice) but not because you can't disclose the letter while the investigation is still ongoing.
Last I checked you always have the right to an attorney (which he did contact) no matter what, but this is only part of the problem with NSL's. It's more the infringement of the 4th amendment that concerns me. This is just as bad as the warrantless wire tapping that was going on (and most likely still it). It's an abuse of power if you don't have one branch of government checking on the other. Now if the NSL came with a warrent, signed by a judge to obtain the information/items that where being asked for in the NSL (with just the NSL having the gag order to "protect the ongoing investigation") that would be IMHO would not be an abuse of power.
"All the people are so happy now, their heads are caving in. I'm glad they are a snowman with protective rubber skin" -- They Might Be Giants