If you're in a corporate environment, it's likely that you participate in a certain number of conference calls. Lurkers are what we call those who join calls but don't announce themselves, usually trying to catch someone off guard.
The same can be said of internet discussion groups of someone who follows the discussions but rarely or never participates.
My lurker project has been an argyle vest that has been laying around a while waiting on duplicate stitches and the decision about whether it will be a sweater or a vest.
I need to work in the final ends and I haven't actually stitched the sides because I wanted to make those decisions but I also want to do some side shaping because it did end up a little too wide. I'm also, I think, going to felt it ever so slightly.
I used the size needles recommended on the yarn band but the stitches are a little too open for my liking. I think I can fix that with some minor felting. (It's Galway yarn - which I love - so I'll have to be careful. It's a good felting yarn.)
And the lurker is no more a lurker but a full participant in the wardrobe.