I don't think you should be using SourceForge, GitHub, GoogleCode or whatever if you merely want show your code to prospective employers. These are for live open source projects, or at least for projects that someone might want to use / reuse1.
If your sole aim is to advertise yourself, you should create a little website with some web hosting company, and upload your "wares" there. If you are worried about download charges from random downloads, put a password on the relevant pages and only give it out to prospective employers on request.
1 - I'm kind of making a moral judgement here. You would be using those sites' resources for purposes other than what they have been provided for, and those purposes are purely selfish. Some people would call that "free-loading". You may have no qualms about doing that ... but you should also consider what might your prospective employer think.
OTOH, if you are prepared to put in the effort to turn your code into something worthwhile, write documentation, answer questions, fix bugs, etc, ... then go for it!