Earlier quoted context omitted.
While I think it's quite messed up that a company as rich as Apple can't abide putting credits for people who have put some really good work in (I've even made small updates to OSM in my time) I do think that this is a very classy move by the OSM people, no ranting blog post or 'Apple stole our stuff', welcoming people presents a much better image of the project.
If OpenStreetMap ends up like the KHTML -> WebKit ascendancy then things could be very good for their team in the future.
This is great for OSM because it's starting to show how it's a real player, not just as as "open source map data", but "map data", i.e. it's competiting with the big, non-open source, map data providers now.