For our business needs, we have multiple domain name for our company site. (*.mycompany.com, *.ourcompany.com) Because of the "same origin policy", it seems we need to setup multiple-hosting for our push mechanism. (i.e. push.mycompany.com, push.ourcompany.com, etc.)

Can you please help to verify?
- Is it the best practice to handle this situation?
- what is the maximum number of domain available for multihosting?
- is the setup similar to of clustering.pdf if all our push servers are behind load balancer?