There is https://dotbit.me/ , but who knows how reputable that site is? Just as Bitcoin needed something like Coinbase, the Namecoin ecosystem needs a web wallet with reputable backing.

I guess not necessarily even a wallet.

A non technical user shouldn't even have to own or even know about name coins.

They simply want a way to register a cheap, non-censorable domain, right?

I'm imagining someone would make a service that offers that.