my idea is to use a linux box to automaticaly switch between two dsl lines (from diffrent isps) so i dont have to worry about losing my connection constantly, and when there both on balance the load if possable.
also i am intrested in having a proxy server in the computer to help with bandwith also.
im thinking a raid 0+1 sata150 with 4 80gb drives (thats what i have in my server) but that is secondary.
1. fail-over
2. load balancing
3. proxy server

i know i can just buy one but there eather expensive or dont support much bandwith. I think it would be better to build one. plus it would be good for learning and great for my site.

If anyone has any ideas on where to start or can help me through this i'd love to know.

how many clients on your LAN? is it a 100Mbit LAN?

how fast are the WAN links?

how much gnu/linux experience do you have??

how many clients on your LAN? is it a 100Mbit LAN?
usualy about 15 conections.
but for my partys up to 50.
yes it 100mb

how fast are the WAN links?
i have a dedicated 786kb up and down as my main
and a general cabel modem at 3mbps (i only realy get a 350k dl speed and a 60k up)

how much gnu/linux experience do you have??
medium-little
i can install update (yum or build) work my way around easly graphicaly and getting better with command i have been managing a vps web/ftp server and i have a local ftp server for a few friends, I use fedora core 4 and i started with redhat 7.3 years ago(i bought the dummies guide) but never realy played around untill about 3 months ago i tryed the linux from scratch but dident get far, untill then i just winged it.

i hope this awnsers your questions i'm willing to learn.