How do you set the ContentType property when adding/creating a new SPListItem in an SPList
An SPListItem has a ContentType property but it is read-only in the WSS 3.0 object model.
We prefer to do it directly through the object model (vs. CAML or a web service).

Setting the ContentType for a new SPListItem in a SPList?
xcyborgninja
Here's an example: http://www.sharepointblogs.com/tonstegeman/archive/2006/08/06/9763.aspx
It will be interesting to see where this is documented in the WSS 3.0 SDK.