You can download a totally functional test build that shows where we are at with this, it just will have a large issue trying to work on the first try when browsing or a few other apps. For the actual alpha 3 it will have no widget lockscreen option as that method won't be finished till we have launcher functions & key customization working within it (for the beta). Other than that it should include a preference whether sliding open should cause the unlock, to help protect against accidental pocket slider bumps, have had some requests for that.
Update: Still trying to resolve some more bugs. Going crazy over the failure to wakeup that seems to happen with a lot of attempts following the power key re-sleep. My current fix seems to resolve it when timeout sleeps happen. the bug doesn't want to happen when i'm plugged in to USB monitoring the program log. something in the timing is the only root cause I can think of.
I have a fix so it very reliably yields to any screen popup and runs very smoothly, plus allows exit via home key and use of notification bar. If i can get this bug killed then I will add the option if users want an Unlock slider and roll out alpha 3 with some cool new options and the custom lockscreen....