I just type my password. Ubuntu wakes up instantly and accepts whatever you typed in as the password, unlike Windows (and possibly Mac) which has to wake up before you can type. Reason I know this is because each time I use Windows, it always takes me two tries to login ;-)
I'd normally have closed the lid. So I'd open the lid and hope that OS X hasn't removed all USB attached devices uncleanly.<p>(I need to search for a fix, but never get round to it.)