[shailigum]

The treo pro meets the minimum requirements for 6.5 and considering the hardware start key it should be eligible for an upgrade to 6.5 eventually, the only question is whether or not Palm will choose to continue to support Treo Pro customers considering their release of WebOS.
Windows Mobile 6.5 is a different operating system than Windows Mobile 6 or 6.1 even though its technically only an incremental update, so that means there will be a different licencing policy for 6.5 than for previous versions.
Even though the Treo Pro can handle it that does not mean it will receive it, the HTC Touch and Mogul both have it because they have both been unlocked/cracked, so their lower stature has no impact on whether or not the Treo Pro will get 6.5, but considering how well it does run on the Mogul/Touch (although there are many different factors to take into account), hypothetically speaking it should run just fine on the Treo Pro as well.
I just hope either we get an official 6.5 release or HardSPL.