GoTo..
System preferences-----> Accounts-------> Your account------> login items ---------> Untick skype.
Hope that helps.
Thanks!
Just adding this - unticking it still causes it to load at startup, it just hides the app instead. If you want to completely stop it from loading at startup click on Skype and click on the - at the bottom of the list.
seems like you got it iViking...The other thing is, if it is on your dock, you can just right click the skype logo and check-off the 'open at login' function.