Impulse gets a nice mention in this article by Clive Maxfield about Intel’s FSB acceleration strategy:
…The key to fully exploiting these new platforms is a common programming language and a coherent tool flow. The vast majority of FPGA applications are still programmed using low-level hardware design languages such as VHDL and Verilog. While these methods are well established for hardware-oriented applications, C-language is a more natural environment for software application development. Impulse C provides a means for software programmers to more quickly take advantage of FPGA acceleration, while also providing control and visibility over FPGA hardware optimization.