I'm trying to get Mylyn and Redmine work together so I can manage tasks right inside Eclipse. I saw this on redmine wiki http://www.redmine.org/wiki/redmine/HowTo_Mylyn but I think it's for the old version of Mylyn.
I can't find the Generic Web Connector plugin for Mylyn but there's this Web templates plugin. I think that one replaced the Generic Web Connector. But it's quite different from the screenshots posted at the Redmine wiki. There's no Task URL, New Task URL, etc.
See this manual. http://wiki.eclipse.org/index.php/Mylyn_Extensions
Eclipse Menu. Help -> Software Updates ... -> Add Site...
I struggled with the same thing. It's called "Web Templates Connector", and it's in the incubator.
Add the following site in the Software Updates panel: http://download.eclipse.org/tools/mylyn/update/incubator
Here is what you are looking for:
http://sourceforge.net/projects/redmin-mylyncon/
A Mylyn connector specially for RedMine. It works fine with eclipse ganymede.
The update site is: http://redmin-mylyncon.sourceforge.net/update-site/nightly/
Also a good read from redmine.
HowTo connect a Mylyn repository to Redmine: http://www.redmine.org/wiki/1/HowTo_Mylyn