Below is a great youtube vid by coronet67 comparing the Boss DS-1 and SD-1.
Boss introduced a new Fender Reverb Pedal based on the 1963 Fender Reverb to the Boss Legend series of pedals. To quote the press release:
The FRV-1 recreates the classic spring-reverb sound of the 1963 Fender Reverb via patented COSM® technology. Three classic controls for Dwell, Tone, and Mix allow players to refine their tone, adding buttery warmth or sparkling twang.
Check out the BOSS site for more technical specs and a video showing off the pedal. Available in July. [BOSS US product link]