If you've got a Windows Mobile 5 phone from HTC and have been putting off the jump to WM6 for whatever reason, you're reaching do-or-die. HTC will be pulling its Windows Mobile 6 upgrade link on Oct. 31, forever sealing the fate of your T-Mobile Dash or AT&T 8525. You're still running Windows Mobile 5 though? Really? [HTC via Phone Scoop]
The phone you've pictured is the T-Mobile branded version, which doesn't work with HTC's upgrade anyway. T-Mobile will likely still offer the upgrade since they are still actively selling this phone (albeit with WinMo 6.0 preinstalled now).