You can still use Msn 7 but this "new" build (7.0.0820) :
http://www.microsoft.com/downloads/details.aspx?F...-9904-9505f47bed45
Check the official source:
http://messengersays.spaces.live.com/blog/cns!5B4...30829E!29966.entry
Before talk about Microsoft or any company/product, i think you need to ask the right cuestion or in the right place