Code:
[Mon May 13 21:34:33 2013]00298oMainLoop: just before first while(!EverQuest.ReceievedWorldObjects).
That is a specific point in the zoning or logging in process of the client where it is waiting for a particular packet from the server. I think that only exists on SoF+ clients, but there is a similar packet on Titanium as well at the same point. It is called something like OP_WorldObjectsSent if I recall correctly.
Either way, if you are missing that packet from the server, I think the most likely cause is that you are experiencing packet loss or some type of networking issue where maybe the server cannot keep up. Does the same issue happen on all servers, or just your own or a particular server?
I would suggest trying all hard wired connections instead of wireless networking, as you are sure to have more packet loss on wireless.
I would also highly recommend to not login or zone more than 1 character at a time. When zoning multiple, it is known to cause random zoning client crashes like that and even more-so if they are on Wireless connections.