drag&drop not working at android tablets

When I open usual JIRA web interface in default browser on an Android tablet, on taskboard & planning board I'm not able to use drag&drop to move issues around. I'd be happy to use a special application, but there are no good applications yet on Android for JIRA, and no apps at all for GreenHopper.

Of course this is different platform and user interface, and I'm not sure if this is possible at all, but still it would be nice to have it working. After all - on touchscreen interface it's all about drag&drop. Though - no priority here, it's not an often use case.