OK… it’s not their first announcement of mesh. But Thursday’s late afternoon post gives us more information about Linden Lab’s plans and timing.
What is Mesh?
I’ll say the majority of residents are asking, what is mesh? I’ve seen questions asking, how does mesh differ from sculpties? The Lindens have an answer in their announcement: Mesh Update: Part Deux.

If their definition-explanation works for you, great. It is definitely a non-techy answer. If you want to see MESH in Second Life, press Ctrl-Shift-R. It is a toggle, so press again to turn off Wireframe. If you are wondering how people figure out or remember all the keyboard shortcuts, see: All Second Life keyboard shortcut keys. Remember. There are different shortcuts in Third Party Viewers (TPV).

