It's good to note that Black Hat and DEF CON are not the only nerd gatherings that are happening right now: the Assembly'05 demoscene party is in full swing in Helsinki, Finland.
Assembly, one of the oldest and largest demo parties anywhere has around 5000 geeks gathered together for four days. Many of the techniques used in demo coding are interesting to us working in a virus lab: the fastest demos are written in low-level assembler, and to fit within the tight size limits (such as 4kB or 64kB), some of these demos use really advanced compressing techniques.
To get a feeling on what's happening at the party, you might want to tune in to AssemblyTV.
PS. The controversial Cisco IOS presentation given by Michael Lynn in BHB seems to be floating around in the net - despite the best efforts to censor it.