Software development is something that takes time, so, after checking PyDev out, help in its 'software development' (and software management and software testing and etc. ) by donating (paypal).
Current release: 0.9.2.
Fast install: just go to the update manager (inside the help menu) and add update site: http://pydev.sf.net/updates/ (eclipse should do the rest)
An alternative is just getting the zip file and extracting it yourself in eclipse. If you choose to do it, just make sure the plugins folder is extracted on top of the eclipse plugins folder.