Hi George,
First of all I am sure you know that Point to Point IPSEC VPN due to its nature can not be load balanced ... so when you are saying load balancing vpn what I understand is that you are talking about client vpn connecting to the site, m I correct or not? If it is about client to site VPN then yes the load balancing is possible and what you have to do is to create a wideip and bind this wide ip to a pool which will have three members from each ISP IP which then finally points to your inside VPN device to terminate the connection. May be I have explained it in a very highlevel way to make u understand the senario if yes let me know then i will explain in detail.The browsing can be kept on a single fourth ISP and if the traffic increases the further traffic can be sent to other links but Which version of TMOS are you running on LC????