- Computer Security and Information Assurance - currently focused on web security
- Software Engineering - especially design patterns, refactoring, and testing
- Behavior Driven Development (really digging rspec, cucumber, and Jasmine)
- All things Eclipse - Have worked on several plugins including Photran, currently use Eclipse or a derivitive for almost all development work in Java, Ruby, Python, C, C++, Fortran, and PHP
- Distributed Version Control - Mercurial is my current flavor of choice, although Git suffices just as well
- Ruby
- Python
- Web Application Frameworks - currently either using or learning Spring, Pylons (Shabti), and Ruby on Rails
- System Performance Analysis, finding bottlenecks in both hardware and software, focused on database performance (notably DB2 on i5/OS)
- All things Java - Java EE, Spring, JSP, Ant, JWS
- Linux - Ubuntu on the desktop, CentOS on the server
- Linux Routing, especially multi-path routing through several gateways
- Web 2.0 - integrating asynchronous JavaScript into modern user interfaces
- JavaScript, or ECMAScript to be technical about it - YUI is my library of choice, although I happen to fall back to jQuery now and then
- Database systems - MySQL, DB2, H2 and ORM Frameworks such as Hibernate, ActiveRecord, and SQLAlchemy (esp. with Elixir)