We do not currently support mapping multiple domains to your about.me page.
If you have 2 domains and you want both to point to your about.me page, we'd recommend one of two options:
1. Create 2 about.me pages and upgrade both accounts, one for each domain.
OR
2. Forward one domain to the other in your DNS settings, managed by your domain registrar (like GoDaddy or Namecheap). Please contact your domain registrar's support team to help you with this.