The SVG 1.0 specification became a W3C Recommendation in September 2001. The specification is published at http://www.w3.org/TR/SVG/. SVG 1.1, like XHTML 1.1, modularized SVG, and the January 2003 Recommendation is at http://www.w3.org/TR/SVG11/. That modularization was used to produce the SVG Mobile Profiles: SVG Tiny and SVG Basic, also published in January 2003 at http://www.w3.org/TR/SVGMobile/. Work on SVG 1.2 is ongoing, and the latest drafts can be found at http://www.w3.org/TR/SVG12.
SVG is a language for describing two-dimensional vector and mixed vector/raster graphics in XML.
The SMIL 1.0 specification became a W3C Recommendation in June 1998. It is published at http://www.w3.org/TR/REC-smil/.
SMIL allows a set of independent multimedia objects to be integrated into a synchronized multimedia presentation. While SMIL itself hasn't caught on, some important pieces of SMIL are now in SVG.