I use HotKeyNet, which is a fantastic program if you have the willingness to learn. It's worked with every single MMO I've played and does everything I could possibly want. Right now I've even got it set up to fake mouseover healing in a game that doesn't even have the ability to make macros.

I've also used Keyclone and ISBoxer. I wouldn't use that product that shall remain nameless if you paid me.

Personally, the only use I see of going to 3 is it's 1 less slot to fill. If you've got people that you often play with, or you don't intend to solo dungeons then you don't need a full group, of course. It'll make you one toon more powerful, but it's also one more class to learn, one more toon to work out rotations for, one more toon to loot for, one more toon to buy mounts and gear for, one more toon to repair.

And of course it's 1 more subscription to pay for, one more account to upgrade, one more expansion to buy in a few months.

And people don't so much notice one dude following another. Two people following, they notice, so your potential for being the recipient of impotent nerdrage has gone up exponentially.

The next class, I think it'd depend on what you're doing. If you plan to do dungeons, I'd probably go with something that you really don't have to pay too much attention to. Ranged classes are usually easier, and something that can assist in wipe recovery is always a plus, so I'd say a shaman, druid or warlock. But it really does depend on what you're going to do and how you enjoy playing.

I think the RAF setup was covered already, so I've got nuffin'. Doing it the way Red and Zub outline, you'd be leveling 2 new characters, so you should experiment. I'd say bring up 2 classes that can be either healers or DPS, for example a druid and a shaman. This way if you decide you want to use a different healer at 80, you can easily swap roles.