indeed, the auto-generated landingpage unfortunately shows a completely outdated version of pdt. You should install PDT via the regular Juno updatesite which is the built-int one (no need to add an additional updatesite). The current version is 3.0.0, and 3.1 will be released with Juno SR1 which apparently will be released today (28th September 2012).
I'll file a bug entry for the wrong repository link on the landingpage, hope this gets resolved soon.