Steve (Tikiman) posted a letter sent to some travel agents regarding construction at the Poly:
"Resort Renovations will begin at the Polynesian resort starting in September that will enhance the entire resort. As part of these ongoing renovation projects, views in some Guest rooms will be impacted beginning in September. In order to accommodate guests, Disney will be making changes to certain room categories in impacted buildings. The renovation will impact views from some rooms in buildings 5, 9, 10 and 11. Also, beginning in September, a portion of the east parking lot nearest to building 11 will temporarily close. In addition to that, access to the beach area on the east side of the resort, as well as Sunset Pointe (the grassy hill overlooking the Seven Seas Lagoon, located between the east beach and the main beach near the Nanea Volcano pool), will be unavailable. All other amenities (restaurants, pools, merchandise locations, etc.) will be available."
He mentions he may post a new article soon regarding the details he's received from his sources.