Well I 'recruited' myself a trial account (WoW, TBC and WotLK ordered from Amazon too) and started work on a set of 3 undead warlocks, but ran into a bit of a problem, as only 2 of them are getting the bonus XP, meaning I have to regularly take the 3rd and go kill a bunch of stuff until it catches up.
The 3X XP is going to be handy for the 3rd DK though, as it'll make getting a L55 character on the new account easier. I'm going for a druid, seeing as they can do pretty much anything depending on spec, and I've made a new priest to level alongside it on my main account, seeing as you only get XP if the 2 characters are within 5 levels of each other, and I don't have any other alts to level with (too many twinks).
I think the best part is, once the druid hits 59, I'll be able to grant 28 free levels to any characters on my main account (and another 9 from the warlock once it's finished). That's going to save me a ton of low level grinding
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