Ramen “Theme” for this Site

I’ve been using WordPress for about 3 years now, starting with WP 1.2. We are now running WP 2.2.3, and I'm still using the old theme that I used for 1.2. I can't tell if I'm missing functionality because of not using a native WP 2.x theme. Does anyone know whether I need to "upgrade" my theme? I played with the K2 theme and taking all my customizations over to it will be a major pain. If any of my readers know the answer to this, please let me know using the form to the right, thanks. -->