The keyword is "reliable". Solve this problem and you have a product.
Perhaps you need to think bigger than your own project, but develop something that others can incorporate into their product. Designing a basic chat service is relatively easy and will become even easier in the future with programming languages like Erlang/Scala becoming more popular and widespread. (Chat programs are often the "hello world" programs of these languages in tutorials). But designing a robust video-chat service is something that not many companies can pull off.
Perhaps you need to think bigger than your own project, but develop something that others can incorporate into their product. Designing a basic chat service is relatively easy and will become even easier in the future with programming languages like Erlang/Scala becoming more popular and widespread. (Chat programs are often the "hello world" programs of these languages in tutorials). But designing a robust video-chat service is something that not many companies can pull off.