It sounds like some temporary breakage in the packaging of some sid
packages. Nothing much. Being a sid user means you should be able to
investigate the errors being reported by apt-get, track down the root
causes and possibly help resolving them.
You *do* know sid is the *unstable* distribution, right? Mainly for Debian
developers themselves to test their packages or for people who don't mind
having their machine occasionally rendered useless because they probably
have the skills necessary to put it back in working order.
It seems you're getting a first taste of sid even before installing it...
Are you sure you understand what you're getting into?