Problem creating MapPoint of Lat Long coordinates with basemap wkid=3857

[DaveEaton]

Previous to ArcGIS version 10 it was my understanding that you could pass lat long coordinates to a map with the projection of: WGS_1984_Web_Mercator_Auxiliary_Sphere which had the wkid of 102100.  Now the equivalent wkid is 3857, so I should be able to pass lat long coordinates to my basemap with that projection, but it is not working.  If I pass the MapPoint coordinates as wkid=3857 it works, lat long does not.  Any help would be greatly appreciated!

[DaveEaton]

For anyone who may happen across this question, I found the answer here:  http://forums.arcgis.com/threads/34134-How-to-use-longitude-and-latitude-to-set-center-for-map