How to manage the web presence of a research group
There are many things that could be useful for the web presence of a research group, namely:


A brief presentation of the aims of this research group
The members of this working group (past and currents) with a link to their homepage
a list of publications by this research group
if there are working groups organized by this research group (for instance a presentation every two weeks by one of the member of the work done)
Other results such as software ...
Maybe a link to the people funding this research group, a little advertisement never hurts.