MyCGI has been running the "global scores" service of my multiplayer game for a year , flawlessly :-)
http://www.amok.com.br/outgun/
Recommended, the only downside is that in the peak hours you app may become unavailable for a minute or so in like 10 minute intervals. they are working around this tho.

Hey, this JGP profile / proposal thing needs a "multimedia timer" API, since Java doesn't have one already!

See:
http://developer.java.sun.com/developer/bugParade/bugs/4478186.html

this is important !!