An article from the Maine Public Broadcasting Network explains that initial reports were that all these "terror packages" are actually harmless. Obama however is calling them a "credible threat." Someone else is saying this was just a test run. Why do a test run at all? Some have been saying the idea is just to make a scare, even if a harmless one. Why is Obama making a big deal out of it then which only would help the originators of the plan in creating havoc? None of this makes much sense.
I'd place my bets on pre-election PSYOP.
Of course it will also bring on some new Homeland Security Measures, including "advanced imaging technology" like those body scanners Homeland Security has been trying to sell everyone on.
See Also: Obama's UPS Bomber Linked To Dubious Terror Cell