I like this format:
Frequently use: SQL, Javascript/AJAX-JQuery, HTML and CSS, PHP, TCL, C++, XML, Ruby
Occasionally use: Some shell scripting, Java
Used to use but have grown rusty: C
Basic understanding/rarely use: ASP.NET and C#, the EE environments of Java - so much to build on. - Q/E/BASIC, visual basic & .net. RPG, COBOL, PL/SQL