RE: Is Dynamic WEP Secure Enough?

  It depends on your requirement.  If you're looking at
it from the perspective of protecting your data from (a)
determined intruders and (b) insiders who already have WEP 
access, then obviously not -- running IPSEC over your WLAN
is a better way to meet that requirement.
  But it does make a useful tripwire.  Nobody breaks WEP
by accident, and anyone who does break onto a WLAN running
WEP cannot believably claim not to have known that their
access was unauthorized.
  If your provide multiple SSIDs, some with WEP and some 
without, people who just want guest access to the Internet 
will use the non-WEP and leave the WEP alone.

  There is no "secure enough".  There is only "satisfies
requirements X, Y, Z" -- or doesn't.

David Gillett