I updated my WikiWebpart. You can now download it as a SharePoint Solution.
Steps to install the solution:
Add the Webpart to your Wiki library
Now you are done. You can add the Webpart to any Wiki library you like. To make this process easier, I wrote a little tool for it. You call it with the weburl and the Wiki library name as parameters.
RH.AddWikiWebpart.exe http://sharepointurl/somewikipage "Wiki Pages"
Done.
One more note. Right now the Webpart only displays english text. When I find a solution to add the resource assemblies for german, I will update the Webpart.
If you have previously installed the Webpart manually, remove it from all Wiki library EditForm.aspx, from the Webpart gallery, and from your web.config and bin folder.
Update:
Multilanguage Support is back ;-)
You can download the solution and update it via
"stsadm -o upgradesolution -name RH.WikiWebpart.wsp -filename RH.WikiWebpart.wsp -immediate"
Update 23. Apr 2008:
I have released a new version. Bugfixing only.
Update 5. Jul 2008:
A new version with support for uploading files additionally to pictures.