I have added nitdroid forum parser to siilihai web forum reader. http://www.siilihai.com/forumlist.html
The siilihai web forum reader is a program for reading forums and is being worked on for harmattan.
When the app is finsihed you can add nitdroid forum in the app and read the forum inside the app.
I have added sign in support for the nitdroid forum and it seems to work pretty good.
the app is being made by vranki over at tmo.http://talk.maemo.org/showthread.php?t=81494