I guess this is NCI week for me. For the record I have no relationship with NCI other than I am a stringer for them (i.e. a sub-consultant) periodically.

I know, of course, a lot of people in their energy practice having worked with them for over ten years prior to establishing my current practice.

Of course it applies to other types of consulting firms.

I would add one that I also currently provide - my clients can subscribe to an RSS feed related to confidential communication related to a specific project. If I post a file, edit a file, post a note or edit a wiki document - it shows up in the RSS feed (and they receive an email notification too).