The Dynamic Periodic Table site has an amazing, interactive table that can give you a lot of information about elements. If you click on an element it gives you the Wikipedia article about that element. If you move the slider on the top right of the table you can see how the elements change state due to temperature. You can isolate the groups of metals, nonmetals, metalloids as well as the halogen and noble gasses.
One slightly hidden gem is the tabs at the top. Click on the orbital tab and it will show you the number of electrons found in each elements shells. Very, very cool!