Very likely KDE will participate again in the Google Summer of Code. At this moment two project ideas are written up related to chemistry:worked on this topic in the past myself. See also Carsten's post on this.
The only thing I really miss in the full list of ideas, is the idea of completing a Greasemonkey plugin for Konqueror. I could not mentor a project like this, and, therefore, cannot put it up on the idea list :(