[Routing] Bringing routing functionality to a web-mapping application - but how?

[Frank Glück]

Hi,

is there anyone here, who has experiences with this PostgreSQL/PostGIS  
extension?

http://pgrouting.postlbs.org/

Is it useful and stable? Do they still develop?
There even exist an import tool for osm-data:
http://pgrouting.postlbs.org/wiki/tools/osm2pgrouting

Which routing alternatives do you use for your web-mapping applications?  
How does for instance www.OpenRouteService.org solve this purpose?

Thanks and greetings,
Frank