I am a paid member of astalavista.net and use it quite frequently in
addition to FD, BugTraq, etc., as it represents a gray area (though not in
the line of .box.sk).
My experience is that it is a collection/source of well-maintained
information. There is a Swiss team behind it. Whether it is worth the money,
that is up to you - the problem is that they don't give trial subs. All I
can offer you is a few full-size screen shots:
http://www.frame4.com/exchange/main.png
http://www.frame4.com/exchange/directory.png
http://www.frame4.com/exchange/vulndb.png
http://www.frame4.com/exchange/forums.png
Hope this provides some insight!