OK - so my promise now that we've shipped is to try to blog more. So, here ya go - 2 in a few days!
Was reading Fontana's article in ComputerWorld on Config Manager 07 RTM, and he talks about the story withy CM 07 and SDM/SML. Here's the article: http://www.computerworld.com/action/article.do?command=viewArticleBasic&articleId=9033158&intsrc=news_ts_head
So, something to clarify so that you guys don't think that you have hidden migratory problems ahead of you somewhere. The Systems Definition Model (SDM) is what our mgmt division has been working on the past 4-5 yrs in creating an application model whereby manageability can be a first-class element. Manageability has historically been a process of building the app, and IF TIME PERMITTED - add some perf counters or some fundamental eventing behavior. We want to change that behavior to allow manageability to really be baked into the app right up front. SDM was cool - and was getting a lot of support. But, we knew that manageability was bigger than just MS - so we started working with other vendors to really take SDM to the mainstream. As SDM evolved in these conversations, so did the name. The Service Modeling Language (SML) was born out of that collaboration.
Now, what is in what? System Center Configuration Manager 2007 uses SML (not SDM) for our modeling language for all of our Desired Configuration Management (DCM) functionality. So, nothing needing "migrated" from SDM to SML for SCCM 07. The core knowledge that we'll ship from MS for config mgmt of our apps will be in SML. And, as SML continues to evolve, like always - it will be a primary goal of ours to help you move this knowledge along with you. So, just like today - where we make upgrade/interop a high-priority when we release a new product, this will be the case as we go forward to do more with DCM in future versions of SCCM.
Just wanted to make sure you gys didn't think we shipped 4 days ago, and the product was already out of date! 
Lemme know if you have further ??'s.
Bill Anderson
Lead Program Manager
System Center Configuration Manager 2007