I started a video guide for heroics, but RL has been crazy and it takes a lot of work editing all those videos etc. If you set a goal I guess it's cool and all, but I just play for fun. The heroic project started as something to do for fun, and I'm determined to finish it when I get some free time.

I don't know about WOTLK but in TBC most the 5man heroics are a million times easier with a 5 dps setup, but I've seen videos of 1 tank 3 dps 1 healer doing almost everything so I'm not bashing you. After WOTLK though who knows they are adding some insane talents for everyone so maybe the 3dps/tank/healer teams will be more viable in terms of multi-boxing, but the insane DPS talents may make 5 dps even more viable over the 3dps setup.

PVE multi-boxing gets old quick IMO, it can be fun but soloing 5mans can only last for so long. I've never raided multi-boxing other than 2boxing a healer once or twice I think that maybe my next direction for multi-boxing is 5 boxing in Kara/ZA with 5 other people, then maybe moving into the 25man content. Right now though, I'm content with pvp and altidis.

P.S.
I leveled an Alliance group of shamans to 70 and was like man I wish I had made a video experience from 1 - 70.
Then I rolled my Horde group and started making videos from day 1, about 20mins into day 1 I was like ok no one will want to watch this. So I was like I will make instance only videos, again every video had been done and it slowed down my leveling making videos. So I was like ok I'll make videos at 70 with some pvp / instances / heroics whatever. If you got the time more power to you, but I feel that with videos/blogs of everything you spend more time talking about playing/showing your stuff than playing. That's what put me off by it, but now I kind wish I had done a video blog or something.