While browsing I have just found what I was looking for
a half year ago. What I have in mind is a proper Web Interface
for Microsoft's Team Foundation Server.
That tool comes from a company named devBiz, which was meanwhile aquistioned
by Micsosoft. Their TeamPlain solution seems to be the one which will be
the future WebInterface for TFS.
AND .... The best Thing is .... This tool is for FREE for valid TFS license
I'm gonna to check this out and will for sure come back on this, after
having collected some first impressions.