MySites for non-Active Directory users

Hi,

we are planning to provide a collaboration farm for

• internal users (AD)
• external users (external AD, no-trust relationship)

We plan to authenticate users via Claims/ADFS. The idea is to provide a MySite-Farm. 

Questions

1. Are there any issues with providing MySites to non-AD users?
2. Are there any limitations for providing MySites to non-AD users?

Sven