Thrixx - in Foresight, you currently cannot install a deb file. We use Conary for all of our package management, and not dpkg like Debian or Ubuntu.
However, our repository has a lot of software, including Skype.
To see if a package is available for installation in Foresight, you have 3 options.
If you're using Foresight 1.4.1 or newer, you can search using PackageKit (System -> Administration -> Add/Remove Software)
Browse Foresight's repository online: http://www.rpath.org/rbuilder/repos/foresight/browse
Or use the command line and type: conary rq packagename
If you have more questions, please feel free to drop by in our IRC channel on Freenode, channel #foresight or just click on "Get Live Help" in the Applications menu and it will take you straight there.
If there is a package you are looking for that is not in our repository, please stop by IRC or fill out a package request in our bug tracker at http://issues.foresightlinux.org/secure/Dashboard.jspa