Tried to view some of the corrections I made some days ago, I could not see them. Switching to the editor showed that the changes where there, but not on the "real" map.

After a brief search I found this FAQ:
osm.wiki/FAQ#I_have_just_made_some_changes_to_the_map._How_do_I_get_to_see_my_changes.3F
It opened my eyes to the next page:
osm.wiki/Tiles%40home

What? They have a distributed client, that is used to render the maps - or tiles as it's called. Cool! I saw that there where a nice Windows installer ... that failed. In the discussion, I saw that others had the same problem as I had. So I tried installing it manually, only to fail. Then I saw that there is a virtualbox download, where everying is (almost, you need to do one tiny thing to get it completely installed) installed:
osm.wiki/Virtual_Tiles%40Home

I downloaded the Ubuntu version, as it is the most current. Fast download via BitTorrent, quick setup with VirtualBox (that I have never used before). It got up and running real fast.

The way it works is like most other distributed projects:
- Client running at a users computer
- Server on insternet has job for client
- client download job from server
- client process the job (creating new tiles)
- client uploads result to server
- client waits for next job

I love distributed computing, but don't want to run it all the time. I'm on a notebook, that can get very noisy when it has to work 100% all the time. This is where tiles@home is great. I start it when I want to, let it run for some time and then shut it down. The work unites are quickly processed, so you will see the results quick.