I found it. As it turns out you have to extend your existing road with at least one segment. That one will connect to an existing road. Then if you end up with one node to many you can just delete it. It's a little fiddly, but it works.

Well, I like the idea of participating in creating a world map very much and I started in my own neighbourhood, but I have now a lot of questions which all came up in an hour or so of working with it and all of them couldn't be answered by the wiki, the faq or the forum.

1) How do I connect two roads of a different class?

2) Why are only parts of my creation visible in Osmarender. (I’m still waiting on Mapnik). All of the houses (landuse: residential) don't show up, but two business buildings (landuse: industrial) do.

3) Why can’t I change stuff from AND? Well, I can change but they don’t save!

Question 1 I posted on the forum; let’s see what happens…