Both downloaded and installed today (8/18/10). It took me 6 hours follwing video closely TWICE.
Joomla Version 1.5.20
JomSocial (Trial) Version: 1.8.7 (they don't offer older versions for download)
There are no duplicate entries for #82. If I delete "#82" in the database, it just gives the error for "#81".
Error when accessing the site:
500 - DB function failed with error number 1062
Duplicate entry '82' for key 'PRIMARY' SQL=INSERT INTO `jos_community_users` ( `userid`,`points`,`thumb`,`avatar`,`params` ) VALUES ( '82','0','components/com_community/assets/default_thumb.jpg','components/com_community/assets/default.jpg','notifyEmailSystem=1nprivacyProfileView=0nprivacyPhotoView=0nprivacyFriendsView=0nprivacyVideoView=1nnotifyEmailMessage=1nnotifyEmailApps=1nnotifyWallComment=0n' )
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NOTE: In the video here: http://video.gavick.com/video/template/quay_nov2009
There are some differences:
1. The Gavick zip file (jomsocial_theme_31.07.2010.zip) only has "gk_style" folder and not those referenced in the video: gk_quay_blue, gk_quay_green, gk_quay_red
2. The video says the SQL dump should import 1271 queries, when the included SQL dump only does 211 queries
Not sure if this makes a difference...