@Sashin_G - While Windows NLB does have limitations, I know that we have customers using it. I want to show that here, and will do so as we get to those sections. And as you say, any architecture has pros and cons. I am deploying my lab using TMG to show that use. As with all decision points, thought needs to be put into whether you utilize a reverse proxy or not.
@Adrian Pettitt - I will certainly expand my thinking around what to do with the DPM entry, thinking more around bare metal restores or other DR scenarios. I think that what you're asking for around archive mailboxes and folders and such will be covered in the same entry as what @Steve mentioned above.
As with any of the blog entries, if I miss some technologies or questions, let me know. We'll surely either have some "dogs and cats" entries (rounding up the things we missed), or I can answer in the comments.