How do I access $membergroupbits from any page, in a shorter format?

[dwh]

I'd like to access $membergroupbits but have it look different. Rather than one line and two <td>'s for each usergroup, I'd like it listed like so:
usergroup1, usergroup2.

Is this possible? And I'd like it available on every page. In the little welcome window where it says Welcome, username. You last visited, blah blah. Private Messages: blah unread.... You are a member of usergroup1, usergroup2.

[dwh]

Did I post this in the right place