repository error after trying to install Skype

I attempted to install skype for linux by using the following as per instructions at http://technical-itch.co.uk/2007/09/18/how-to-install-skype-on-ubuntu/

sudo wget http://www.medibuntu.org/sources.list.d/feisty.list -O /etc/apt/sources.list.d/medibuntu.list

wget -q http://packages.medibuntu.org/medibuntu-key.gpg -O- | sudo apt-key add - && sudo apt-get update

sudo aptitude install skype

none of it worked, it said something along the lines of cannot find such file.

Now I cannot open synaptic package manager, the error message says

E: Type '--2010-03-23' is not known on line 1 in source list /etc/apt/sources.list.d/medibuntu.list
E: The list of sources could not be read.
Go to the repository dialog to correct the problem.
E: _cache->open() failed, please report.

and update manager says

Could not initialize the package information

An unresolvable problem occurred while initializing the package information.

Please report this bug against the 'update-manager' package and include the following error message:

'E:Type '--2010-03-23' is not known on line 1 in source list /etc/apt/sources.list.d/medibuntu.list, E:The list of sources could not be read.'

I dont know what to do.

Dave