There are third party apps that allow widgets/apps on the lockscreen, if that is what you are looking for. You won't be able to create the Sense 3.0 lockscreen on the Hero without major edits.
I searched XDA and couldn't find a .apk file that would work with our phones. Just use one of the many lockscreen apps if you want to access widgets/apps from the lockscreen
Hey Candroid, check out this ROM that is based off a port of Sense 3.0. I have not tried it yet but people in the XDA thread are saying its pretty good. I'm going to give it a try soon and see for myself -- its always good to try new ROMs out every now and then