Running 38 and it's very smooth with ADW EX. Also got EDW Notifications and it's nice. Tho I did notice that by default it doesn't sync GMail, you have to go into your Google Account and set that manually. After I did that, all's been well.
This has been the case on all of HTC's Froyo releases. They're aware of the issue but don't seem interested in fixing it. No one, to my knowledge has found a fix for this, other than installing the vanilla email client and using it instead.
Word hit the streets in the UK that the update is rolling out OTA starting today. I'm figuring Paul should get his hands on an RUU in the next 48 hours, which means Desire / N1 builds in two to three weeks. I'm ignoring the DesireHD ports in favor of this, something we know will fit on the phone without the need for an external partition.