In the new blender you can press ‘G’ in edit mode twice to trigger the edge slide tool. I know about this because someone mentioned it in the comments on BlenderNation. I saw no other indication that this feature existed.
The header bar shows ‘Dx: Dy: Dz:’ when in grab mode. This should also have text saying something like, “Press G to slide”. Any other hidden tools that work the same way should do the same.
This would mean that all users learn that there’s a new feature. Even the ones who aren’t on BlenderArtists, the ones who don’t obsessively check blender news, and who didn’t read the release logs carefully before opening. God forbid, it might even filter through to people who don’t worship the software at all…
I’m just as sick of making these UI threads as you are of reading them, but I’m going to suggest one more thing, a maxim for development, for the consideration of Ton and the management:
If a new feature is added, it should be evident somewhere on the UI.
Not obnoxiously, not in big red letters, and not visible all the time. But where it’s relevant, when the context and mode are correct. Because you know, maybe hinting that this feature exists might stop people coming on the forums and asking for it.
So why not make it a rule for inclusion: if you’ve made a new feature, draw attention to it somehow. Else, for 99% percent of people, all your work is wasted. Or do you just really like the feeling belonging to an exclusive secret club?