Hey, and welcome! =)
Invites are send from Battlenet. I got the message: your invite are queued for validation, your friend should recive the invite shortly (or something like that). If you dont got the invite by tomorrow, let me know.
The invites are send from my shaman team, if it works =)
...also, this is the 4. time i try to reply to this topic, got errors before, dont know why, but if i have answered several time, thats why! =)

/woko =)