Just to announce that the current release of WL doesn't work fully on 2.8. When you hit 'Save' in a widget the AJAX way, the widget comes back without the WL field. refresh the page and it's there again (and the changes have saved??) - but it's still teh suck.
so I have updated the code to make it work with this new bit of 2.8, and it's available as v 0.46 in the 'development version' on the versions page.
If I don't hear anything adverse about it (say if it breaks anything important in 2.7, or there's something else new in 2.8 that i've missed) in the next couple of days, I will tag it up as an official update.