Today I did a webinar on MDX solutions. For those of you interested you can grab the slides here and code example here. If you missed the session you can also download the recording here.
We do monthly webinars so make sure to check view are site regularly for free training!
I also mentioned an article I wrote on dynamic/table basic security in SSAS that is available now. http://www.bidn.com/articles/ssas-administration/134/analysis-services-dynamic-security