I am very very unpleasantly surprised and unhappy with skype 3.01.
The obligation to install user accounts in windows xp is an unnecessary complication.
I use skype with my wife and we both have a different skype name.
Previously it was easy to log in with a different name.
The 3.01 version has deleted this option and didn't inform skype users about the change in advance.
Thus when I trusted the skype download to be an improvement i found out this wasn't an improvement at all but a limitation that i didn't want at all!
But to add insult to injury, i couldn't get back to the previous skype 2.x version![size=5]

do you mean simultaneous logins or do you mean switching between accounts (one offline and the other online)? both are still very possible.

and the obligation to create second windows user accounts has always been the case for skype versions in order to run simultaneous instances.

exactly what option was deleted?

First of all this sub forum is about Skype 3.2 for Windows. Please try to write more understandable. To sign out of your account and sign in to an other one just click: File>Sign out.
For further information about how to run two different Skype accounts at the same time please see this topic.
Regards!