[fadmmatt]

Neat; but C++0x does this:

[](int x, int y) { return x + y; }

instead of this:

lambda<int> (x,y) --> x + y

Ironically, the template hack could be shorter in many cases.

[tbrownaw]

And those few extra characters give you an enormous amount of flexibility, such as not needing to define wrapper template specializations for all your types, not needing to have extra variables sitting around to define your argument placeholders, and being able to use more than just simple expressions.