1) Will Proclarity v6.2 or v6.3 support sql 2008 ? Not sure about 6.2, but we understand that it is likely that 6.3 will support it at some point in time which has yet to be made clear to us.
2) What version of Performance point support sql 2008? You would need to ask the PPS support folks on their forum as I haven't heard anything about which PPS version will support 2008. http://forums.microsoft.com/TechNet/default.aspx?ForumGroupID=517&SiteID=17
3) How long with Proclarity v6.2 or v6.3 be supported with sql'05? 6.2 will be supported until June of 2009. 6.3 will be supported on the standard Microsoft 5+5 lifecycle and was release about 1 year ago. http://support.microsoft.com/gp/lifepolicy
4) Will there be any more hotfixes to 6.2? I believe that there will be, through June of next year. To date, each hot fix that has been released for 6.3 has also been released for 6.2.
Hope this helps,
Bob