What web language for server side scripting?
icey: You're going to have to define what sort of speed you need for #2. If you're talking about basic CRUD, then all of the languages you've specified will work just fine. If you're doing a lot of scientific work, then you might want to look at Python, along with NumPy / SciPy. If it's a small core of calculations that you know you'll have to execute over and over again, then all of the above are fine if you're happy to interop with C.So... whatcha building?