Have you checked for ID collisions? As in the same number for a different object type (node/way/relation). I’ve got a similar (but less visible) issue where my home is mistaken for a super market >500km away.

Für den deutschsprachigen Raum kann man auch die Karte auf openstreetmap.de betrachten. Dort ist die ÖPNV Karte mit eingebunden :-)

33.812, 150.983 is in the ocean but -33.812, 150.983 is in Sydney :-)

OpenRelief bezieht sich auf “disaster relief/Katastrophenhilfe” statt auf “relief/Geländekontur”. Und Geländemodelle gibt es mit SRTM(-3 und -1) sowie den X-SAR Daten schon einige ohne Einschränkung in der Verwendung der erzeugten Karten.

Der Rettungswagen fährt üblicherweise in die Nähe der hektisch winkenden Personen die auf der Straße stehen… ;)

You might be interested in loading your schedule and map data into OpenTripPlanner. There seems to be mobile apps that integrate with it already.

Good hint. One look in josm revealed that the area around the node Mainhausen is the site from which the DCF77 time signal is transmitted which belongs to Mainflingen ( http://en.wikipedia.org/wiki/Mainflingen )...
Mainhausen itself is the village to the left ( http://en.wikipedia.org/wiki/Mainhausen ).

Solution seems to be moving the node or merging it to the area of Mainhausen.

I think you have swapped latitude and longitude.

That's more a question for the tool you are using to display the map. If it's OpenLayers on a website, there's been a discussion on possible ways to display AutoCAD drawings starting at http://lists.osgeo.org/pipermail/openlayers-users/2009-May/011805.html

Da man Hausnummern per Relation an die richtige Straße hängen kann würde ich das für POIs ähnlich erwarten... Quasi POI per Relation an die Lokation/Hausnummer/Straße verbinden. Ist das nicht so?

You can attach the place you are talking about to your diary entry. OSM is about maps after all. :)

Laut http://raumbezug.eu/ag/internet/osmGarmin.htm muß die Datei gmapsupp.img noch auf das Garmin GPS Gerät übertragen werden.

Well, I tend to avoid cycleways on either side as they tend to be in bad shape, curving around between trees, parking slots, etc and obstructed from the view of car drivers... But then, waiting to pay a penalty for this, too :)

First google hit on that topic: http://radweg.radzeug.de/

I suggest to allow the router to have a legal default. (and some advanced "ride as everyone does anyway" option)

In germany you must ride on the wrong side of the road if there is a cycleway but not on the right side.

So if you got a long road that has partly dual cycleways and partly just one cycleway you must cross the road multiple times!

So it's nice to tag it correcly to enable the router to penalice such roads for cycle routing.

Had my first experiences with "professional maps" an turn-by-turn navigation last week... suggested 2 illegal turns in a 15km downtown tour... we can do better then that! (lucky me I was just letting the device suggest a route for fun)

Ich würde mich für die Kabelverzweiger an den Hauptverteilern orientieren (siehe osm.wiki/DE:DSL-Hauptverteiler )
also man_made=SAI (Service Area Interface) und operator=Deutsche Telekom AG

I guess there's not to many ways to fire up openlayers with a transparency slider and the popular maps as base layers ;)

Huh? The flickr blog (here http://code.flickr.com/blog/2009/09/28/thats-maybe-a-bit-too-dorky-even-for-us/) itself says:
That means you can subscribe to a feed of all the (public) photos tagged with osm:way= or osm.wiki/Tag:osm:node=...

Openlayers should do that, here are some examples:
osm.wiki/index.php/OpenLayers
http://openlayers.org/dev/examples/sundials-spherical-mercator.html

Your Blog/OtherPlace might already have contributed plugins to display osm maps, too.

Optimizing Ways should not touch the route calculation time, if it does it's a bug ;)
(It might reduce the time to prepare the data for the routing engine, though)