You can clone with
HTTPS or Subversion.
Downloaded the code on Snow Leopard and installed locally. When I try to run a node I get:
Error: Unable to load shared library /Users/my_user/my_project_folder/node_modules/now/node_modules/node-proxy/lib/node-proxy.node
I found that might be for compilation issues, but I get error also when I try the make.
That file is specifically for Windows. Have you tried npm install /path/to/now/? That should fetch the dependencies (which includes node-proxy)
npm install /path/to/now/