Today is the last day to purchase Avianca Lifemiles at a 100% bonus (2×1). They run the promotion (either transfer or purchase) every other month, so it should be back in June/July if you haven’t signed up for an account yet.
Today is also the last day to convert hotel points to US Airways Dividend Miles (except SPG) at a 50% promotion. It’s not a bad value if you already have a hotel redemption in mind. (SPG is excluded unfortunately)
Today is also the last day to buy SPG points at 25% off. This brings the cost of a point to just 2.625 cent.
There is also the Aeroplan Transfer Promotion that ends May 13.