If I could spend all 10 of my votes on this, I would. I'm not even necessarily interested in syncing between computers (which would be nice, but...) - I just want Mendeley to handle my pdf directory getting moved. Now all my file links are broken and I'm going to have to patch together a solution to find them again. Gah! Little (simple!) things like this keep Mendeley as a good product but not a great product.

I was really surprised to see this wasn't at the top! Are there just very few LaTeX users here? This, to me, is a *must have*. I have several LaTeX documents with citekeys already in place....having to go through and change them would be a nightmare.