I want to start using Eclipse with the PyDev plugin, as recommended by this poster. The PyDev download page says I need Eclipse (3.2 to 3.5) and that I can use the Platform Runtime Binary.
PyDev works great with Eclipse 3.6. I'd download the Java Edition, which is pretty minimal (as far as Eclipse can be minimal). Then you can use the brand new built-in marketplace to install PyDev. No need to look up the update-URL. You find the marketplace under "Help > Eclipse Marketplace..." (why they put the market place in the help menu is beyond me...).
Note that if you download the Eclipse Classic edition, you won't get the marketplace.