I'm seriously considering starting to multibox (controlling more than one character simultaneously), but I'm not sure where to begin.
What are the best resources (links, programs, advice) for multiboxing?
The WoWWiki page on multiboxing seems fairly good to me (from a layman's perspective; I've never multiboxed, all my instances of controlling multiple characters simultaneously was with me running two clients and just tabbing inbetween them).
One of the links from that page led me to Dual-Boxing.com, which I remember seeing recommended before as a good multiboxing community.
there's a dude on Hakkar..... he might have changed servers haven't seen him in a few months. He has 5 toons (all shamans) boxed and rules the realm! His primary is zappy the other 4 are variations of this name like zippy etc. I would recomend trying to locate this guy in game as he is really good at it an is ALWAYS welcome in BG's and such. raids as well.
P.S. all taurens... to help you find him
I used Refer-a-friend and referred myself (it is legal as long as you buy a second copy of WOW). RAF gave me a large exp bonus so leveling went quickly.
Dual-Boxing.com has a very good wiki on how to get started. Since most computers these days have enough CPU and Memory, I ran both toons off of my main computer. I used a free program Hot Key Net that allowed me to do picture in picture with both WOW sessions up. It took some time, but after I got it setup it was very fun. There is also a section on dual-boxing about the pro's and con's of different class combination to level.
On the Mac, I used Clone Keys, which is a free program that is based off the PC equivalent, KeyClone. It is incredibly easy to setup, and free, so for Mac users out there looking to try Multi-boxing it is a great resource. I leveled 3 sets of characters dual-boxing their way to sixty using this program and RAF, and it worked beautifully. It does not have as many of the features as some of the PC counterparts do, but some of the ease-of-use is in its simplicity.
I used to use AutoHotKey when I was dualbox leveling, but I technically wasn't using 2 computers, just 1 with 2 instances of WoW, which I thought worked out pretty well. It's pretty straightforward and very cost effective if you have one computer that can handle it (you may need to turn down some graphics settings). If that's what you're looking to do, there are a few guides out there to help:
WoW thread on AutoHotKey.com - http://www.autohotkey.com/forum/topic26329.html
AutoHotKey thread on ElitestJerks - elitistjerks.com/f32/t25906-autohotkey_thread/
How you implement it is going to be up to you, but the basic idea is to map keys from your keyboard to different things in different instances. For my use, I had one "master" character that I was controlling directly, and then one "slave" character that was being controlled by having the key presses pass through.
Something else you could do with 2 instances of the game running is run yourself through instances. For this, I found Two-box Toolkit to be really useful. It has a bunch of useful features: