Thanks for this info David, that's a great improvement on 10 sites. But it is a pain putting the GA code for large sites. Do you know a short cut for this action?
For those who don't know, you can also merge multiple accounts (kind of) using the Access Manager in the bottom lefthand corner of your Analytics page... so if you had two profiles with 10 sites in each, you can (kind of) merge them to be one.