No jeanpierre I don't work for digiMine - sorry to be a cheerleader, but I am honestly very happy with the Digimine solution. However I see your point about the benefits for web outfits...it is true that we're purly online group, but at BillG's little corp. in Redmond (that should tell you about the in house talent we have, and we still went outside). Our deployment time was amazing, mainly because the data integration was so smooth - we were alredy ready to work w/ Digimine when we signed on. I understand why your skeptical, but they really delivered our warehouse & first analytic reports in 4 wks (of course we had them there at 2am and weekends most of that 4 weeks!). I should mention that the 4 week deployment only included our web analytics, including some product/content affinity data mining reports (to see what combination people view our stories & products). The customer segmentation project took an additional 3 weeks.
As for the constant changes you mentioned, it's true that Corporate users and the IT dept. must remain close to keep on top of these. However now Digimine has picked up this day-to-day involvement and the millions of changes we make to our site each day have been answered addressed and implemented seamlessly. That service is part of our monthly fee.
Our major Digimine data mining project (someone else asked) is that we run customer segmentation reports monthly. There is talk about using Digimine's Product & Content recommendations Data Mining solution in Q2, but I don't know much about it yet.
Hope it helps...good luck.