We just finished porting the Serializer Services to work under the Compact Framework for WinCE and MSRS CTP 1.5.

We'll be releasing those services over the next few weeks.   If anyone needs a BETA release, just drop us a line, and we'll email them to you.

Also, please see the following posts regarding using MSRS with WinCE:

http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=1551429&SiteID=1

http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=1536326&SiteID=1