Where to Find Out More About SYCL?
Codeplay Software offer a free "Community Edition" of ComputeCpp, their SYCL v1.2.1 conformant implementation and the developer website includes guides and documentation for SYCL developers.
SYCL Sample Code
If you'd like to watch a SYCL talk, there are some great talks online including Gordon Brown at CppCon 2018 "A Modern C++ Programming Model for GPUs using Khronos SYCL" You can find more SYCL related presentation videos at sycl.tech
There are a growing number of Frameworks that are accelerated using SYCL. Some of these are listed on the Codeplay developer website and they include: