This is the paper we waited for a long long time: the Analysis Services 2005 Performance Guide is available for download from MSDN downloads. This paper is 120 pages of really precious informations. I don’t have time to read all now, but I have found that Appendix C mention the Aggregation Utility, that should be included in AS2005 SP2 samples when it will be released, but it is not available in the December CTP.
Great news, now we need the SP2 to be shipped!