Hi All,
According to Blizzard....
"During an account transfer your character’s guild affiliation and guild reputation will be lost, even if you remain on the same realm."
This is not true. Your guild reputation remains when transferring toons to different accounts on the same realm, all you need is the invite back and you will instantly be exalted.
Not sure how many people this will help, but it was a big find for me as I never wanted to transfer between my accounts for fear of having to get all that rep back.
Hope it helps.
Cheers.