I agree with
jonbendtsen. I think is too early, although we are all excited about OAv2, it's still labeled a beta product. It doesn't make sense to retire one product functional (albeit old) product without having one that replaces it. In the marketing-product-management sense, you'll end up with a gap. (flame the MBA student here...)
Personally, I'm running both OA and OAv2(B6), cuz we still find some features from OA crucial to our operations, here's a quick list:
Embed Alert reports to Homepage (discovered items, not Audited items, partition alerts, SMART alerts). Also push alerts (RSS feeds or email) need to be there.
Search by fields within results (huge time saver)
Links to Warranty, Product Details, Google images (just convenience)
Disk usage graph (important for our labs)
Software register
Built-in Statistics and Queries page from get-go (OAv2 still requires end-user manual input which I have to redo with B6 )
I'm sure these features will inevitable be incorporated into OAv2, but in the mean time, I think retiring OA forums might be the wrong move.