[BlueOnyx:21125] "naked" domains

[Lewis Gardner]

When you configure a vsite in Blue Onyx you have to specify a hostname. 
I usually use www. Increasingly users don't want to prepend the www to a 
domain name.

I use Namecheap basic DNS and have the hosts @ and * so "naked" domains 
resolve to the Blue Onyx server's IP address. Sometimes this works fine 
and sometimes users end up at the wrong site. I don't have a IP address 
available for each vsite.

Not knowing enough about how DNS and Blue Onyx work I'm mystified.

Is there a way to configure Blue Onyx where www.domain.com and 
domain.com render the same site?

If a site is using Wordpress are additional steps required to have the 
Wordpress site appear for both www.domain.com and domain.com?

Thanks!