RIA Services: what would YOU like to know?

As some of you might know, the company I work for is hosting a BESUG session on Silverlight & RIA Services shortly (October 15th / click here to register!), for which I am the speaker.  At the moment, I’m composing a few of the slides and writing up some code, and I was wondering: if you had the possibility to ask a question about RIA Services, what would it be?

I’m not talking about the more general things (like “how do I get to my data”), those things will be addressed.  I’m looking for more specific questions, like “how do you work around having to rewrite code when you regenerate your DomainService?“, or “what are good strategies to achieve X or Y?” Hoping for some input on this, I decided to quickly blog this. 😉

So, in short: what would YOU like to know about RIA Services?  Let me know (mail, twitter, or by replying to this post).  Tnx!