You may wonder why a cutting edge Drupal site like DrupNewb is still mired at V5.x, and hasn't made the jump to V6.x.

Well, don't forget that you need to have all the supporting modules you need for a version of Drupal available if you want to bring them up to that version. Unfortunately, I added a bunch of modules to DrupNewb to test them out. Now I need to either get rid of some modules, wait until v6 versions of those modules are available, or just move them up to 6 and "see what happens".

There's a lesson here. If you add modules willy-nilly you will make upgrading harder. You will also probably adversely impact the performance of your site. I'm certainly not saying don't add modules, I'm just saying you need to consider if a given module will improve your site enough to make adding it worthwile. Which, you see, I had not been doing.