I've been writing in ASP.NET for over a year now. One of my customers is asking me to build him on on-line shopping site.

I can see the list of IBS modules for downloading in here. But what I can't seem to find is some sort of overview which explains the capabilities and limitations. I want to get hold of some info so I can decide if IBS is what i'm looking for.

I've seen the IBS store front and I think it is actually quite useful depending on your requirements.  My option is always to use it as a guideline rather than use it.  I have built a few shopping cart systems and build them all from scratch for the most part.  It saves you from having to figure out where its safe to edit code with out have adverse effects elsewhere in the application.  Hope this helps a little....