Savvas Learning
Chemistry: Central Science Live: Properties of Solutions
This site provides an excellent overview of the solution process. Content includes a focus on how a solution is formed, energy changes and solution formation, spontaneity and disorder, and solution formation and chemical reactions.
Other
Dr. Rod Beavon: The Solubility of Ionic Compounds
A detailed discussion of solubility as a function of Enthalpy and Entropy. Goes way beyond the standard solubility discussion.