A:Answer Regarding the comment suggesting "August 2015," that would most likely be referring to new orders, if that news is indeed accurate—not preorders (for those who have a preorder through Jawbone or Best Buy). I've been in frequent contact with both Jawbone and Best Buy support and have been assured a "January or February" release, at least for initial preorders, which Jawbone have confirmed will be their first fulfillment priority.
The CEO of Jawbone reported to Forbes today (1/22) that the delay is due to "sealing problems," which I assume is in regard to their promise for waterproof operation.
I plan on sitting tight on my preorder for the time being, as the UP3 is definitely the superior product if they make good on their promises on the product page. However, if it's delayed any further and an update of the Microsoft Band comes out in the meantime, it could be the dealbreaker. Other current generation fitness trackers just dont have any appeal to me.