All reading devices using mobile Adobe Digital Editions support SVG. I don't know how complete it is and if there is any difference in support between the oldest versions (Sony PRS-505/700/600/300) and the newest (Onyx Boox 60, Sony PRS-900?).
All devices using FBReader do not support SVG.
Calibre can convert SVG into images customized for a particular device. This might be possible using ePub to ePub conversion, but I use ePub to MOBI and then MOBI to ePub (since MOBI does not support SVG, this forces conversion).