Turn Tag Pages into Subdirectories

I’d like to have my Tag pages: http://MySite.com/tag/TagPage shown as a subdomain: http://TagPage.MySite.com/

I’ve found a plug in that will do this for Categories but is this same technique possible with Tag pages?

I’m running my own server so setting up wildcard subdomains isn’t a problem. Maybe there is a .htaccess solution?

Thank you,
Xandaline