But Open Street Map's founder Steve Coast works for Microsoft. Both Microsoft and "Apple" are backing OSM. Both Bing and OSM share map data. So yeah, OSM is gaining lots of momentum, because Apple and MS want it to replace Google maps and have financially motivated it.
The way I see it -- note, that this is pure conjecture on my part -- is that this is not some ideological or heroic move on Wikipedia's part to support open source on their mobile app.
I see it as either a nudged move(as in an influential "donation") by two juggernauts that want Wikipedia to move away from their competition Google on the mobile front, because Google Maps is already dominant and Android is becoming a titan in the mobile space.
Or as for compatibility it just makes sense; MS and Apple don't want Google maps on their mobile devices -- just like they don't support any 3rd party plug-ins -- but they do want OSM and have said so with their wallets. By going this route, it will probably make it easier for Wikipedia to implement their app onto these closed off devices; as in MS and Apple will give them lots of support to do it.
Anyways, was this Slashdot article just a coincidence, or is it part of some strategic FUD attack against Google, when considering the prior article below this one about them... Don't answer that, I've already assumed the answer.