I see that Dundas have entered the market for ADOMD and ADOMD.Net client components with Dundas OLAP Services. It’s available in Windows Forms and ASP.Net flavours and although it doesn’t offer anything much in terms of functionality that isn’t already available, I’ll be taking a look because a) the web component looks prettier than most of the competition, which isn’t hard, and b) it’s from Dundas rather than a one-man-and-a-dog software company, so there’s less risk about future support.
UPDATE: you can see a live demo on Foodmart 2000 here. Having looked at it briefly, it’s as I thought – does nothing new, but those charts are nice to look at.