If you’d want to develop wifi services i.e. mzone, you should have a mobile site namely m.nttdocomo.co.jp so that I can direct visit the site with my smartphone and can download application from there. just like m.shozu.com, m.flickr.com, m.twitter.com, m.google.com e.t.c. are doing for smart phones.
I am now downloading application in my pc and then transfer that .cab file to my smarphone etc via ActiveSync, so tedious.