There's a company that plans to launch the world's first single stage to orbit rocket in 2018. This is the first time I've heard of this despite the fact that I keep up with these types of developments in the aerospace industry pretty religiously. It might be vaporware, but I think it's about time aerospike engines got some attention.
"...the ARCA Space Corporation has developed a concept for a single-stage-to-orbit (SSTO) rocket. It’s known as the Haas 2CA, the latest in a series of rockets being developed by the New Mexico-based aerospace company. If all goes as planned, this rocket will be the first SSTO rocket in history, meaning it will be able to place payloads and crew into Earth’s orbit relying on only one stage with one engine."