Google's NaCl set out to solve this same problem (pretty much), but I'm beginning to think Grun's Arc might completely shadow Google's work here for many reason

Google's NaCl set out to solve this same problem (pretty much), but I'm beginning to think Grun's Arc might completely shadow Google's work here for many reasons, not the least of which is total flexibility of development environment (i.e. no need for a special "sdk", except to communicate with the browser). Dear Grun - Go you!