Always beware of conference wireless...

ZDNet UK is running an article about some attackers providing counterfeit wireless access to attendees. According to the story, the crackers strolled around the conference with access points running on their laptops and advertising well-known SSIDs (like tmobile). When a victim associated with the access point, the software generated
randomly-mutated malware (to bypass antivirus scanners) and attempted to download it onto the client.

None of these features are new, but the combination is. This is a very nasty (and probably quite effective) use of existing off-the-shelf technology.