I just upgraded my site to Drupal 7. The upgrade went pretty smooth, apart from the migration of my image content which I had to reupload. There is also a change for my drupal rss feed, which changed to another URL due to the upgrade and I'm now using a planet tag too. The old drupal tag is aliased though, so you can keep that if you like. The URL for the planet tag is http://realize.be/taxonomy/term/201/feed and the URL for the drupal tag is http://realize.be/taxonomy/term/50/feed. Planet tags will also be posted on http://drupal.org, so update to your needs.
It was also time for a theme change. I'm using the Sky theme and the Sweaver module to make changes to the css. Not all css is perfect yet, but that will change over the coming days. If you find any other errors, don't hesitate to contact me. In the meantime, have fun reading!