I think the fire department icon is wholly appropriate to a bunch of guys who hang around waiting to slide down a big pole, unravel their hoses and squirt their nozzles all over the place. Or do I just have a dirty mind?

@ blackadder: Lol. I deliberately made them CC-BY-SA to be compatible with OSM. Is there any way to license them PD-compatible whilst keeping my right to be identified as the author?

@ bellboy: Yeah, those are all on the TODO list. Plus toilets, ports/piers, monuments, museums, nightclubs, clothing and book shops, taxi ranks and many more…

In general I prefer to make several distinct maps, each of which is designed for and well suited to a subset of users, rather than one customisable map which tries to be all things to all people. But feel free to use these icons on such a customisable map – that would be cool!

in the long run it would be awesome to get a full set of all map features and every six month there could be an update for new features or changes.
If one thinks this a little further we can think about a real icon theme. Together with a more dynamic Slippy Map where the icons are not rendered but put onto the map as a layer people would be able to change the look of the icons. Other people could step up and make there own theme which can be selected on the main page.

Although the text is a little bit to far away, and you can see the known problem with POIs so close together.

Don’t suppose you’d consider rethinking the licence? OSM icons are traditionally PD… perfect for Potlatch, for which I’m working on drag-and-drop POIs right now. I’d very much like to use yours (currently I’m using 24×24s based on the svg-twotone set) if the licence were compatible.