As this was +1'd quite a bit during 3.0 development, I thought I'd just bump this and also add this observation from redwing:
i guess this seems to be a popular request so i have put the functionality back in MB3
There's no way to know which skin is being used with v3. v2.5 used to show the name of the skin just below "random skin".
Knowing the name of the skins sure does save searching through them all after you turn off random skin