So much for the first theme … too green (add screenshot), and it was hard to distinguish the links from regular text …
… also have to figure out the difference between tags and categories (ie, which is useful for what) …
Looking forward to more new adventures as I explore WordPress.
OK, gave it a whirl, and it looks like categories let you file by macro category (duh), and tags are, as usual, more on the micro level. Multiple tags per post, as in Delicious bookmarks, or multiple labels in Gmail messages. And then a tag cloud gets generated … nice!