Hi,
The best news as this 'add-in' is FREE. You can link companies such that any account created in company A is automatically created in company B. Also, you can go the other way. You can monitor several companies so that any account created by any company is automatically created in all of the other companies.
It does it with triggers, it's really quite cool to work with. Oh yeah, and did I mention it was FREE :)
Kind regards,
Leslie