Even with this I still stick to my predictions in my sig. I have Nintendo selling 1m per month from april through sept. Then 1.7m in Oct, 2.3m in Nov, and a whopping 3.4m in Dec. Granted I am assuming all of the biggest names will launch in the last three months. Super Smash Bros, Metroid Prime 3, SMGalaxy, etc. They showed with the DS and GC that their initial forecasts can be much lower or higher in the end. I think that with these obvious killer apps and the likely newcomers WiiHealth, akin to nintendogs I think, Wii will hit the 19m mark or very close to.
EDIT: After rereading the report, I am right on actually. They are saying that they will sell 20m total by march 2008. I say 19m by December because I think they are being, as usual, a little conservative. However, they did say 4m by end of 2006 and did what 3.8m and 6m by end of march and did 5.8m.