Two months later, Hatena also released Hatena::Screenshot service for thier blog service's users. Registered users can post a blog which includes screenshots by writing the special wiki markup following:
[http://www.kawa.net:image] ( size: midium )
[http://www.kawa.net:image:large] ( size: large )
[http://www.kawa.net:image:small] ( size: small )
Snapshot service is an yet another service which has no Japanese manuals ;)
You can specify height and width of the thumbnail image generated by this service.