Through April 20, 2015, United is offering up to a 30% discount on purchased miles. The size of the discount depends on the number of miles you buy, with the largest 30% discount kicking in at 30,000 miles purchased.

United miles normally cost 3.5 cents per mile plus a 7.5% tax, bringing the full price to 3.76 cents each.

I just applied and was approved for the Discover it Miles Card, which offers unlimited 1.5x miles per dollar on all purchases.

I just applied and was approved for the Discover it Miles Card, which offers unlimited 1.5x miles per dollar on all purchases.

This blog became famous because I was the first to articulate how to book free one ways on United and US Airways awards.

A free one way is a one way trip to or from your home airport that is tacked onto another award for no extra miles.

Brian asked in a comment:
Not sure about the mechanics of using [ThankYou] points. Can I transfer these to AA to receive miles that will be added to my AA balance, or are these points used exclusively on their own for a flight on, say, AA?
Here's how ThankYou Points--the points earned on the Citi Prestige® Card, Citi ThankYou® Premier Card, and other Citi cards--work.

American Express Membership Rewards transfers to Virgin Atlantic miles will come with an automatic 25% transfer bonus from now through April 30, 2015.

Wandering Aramean got "part of an internal memo describing [United's] plans for the coming year." It says:
Deliver first phase of united.com 2.0 by 2q 2015, including bundled ancillary offerings;
Some time in this quarter (by June 30), United plans to roll out a new website with new bundled fare options, which sounds like what American Airlines offers. Not that interesting. Moving on...
begin introducing dynamic award pricing.
Uh-oh!

"Dynamic award pricing" would mean that award prices change, presumably based on the cash price of the underlying ticket.

Wandering Aramean got "part of an internal memo describing [United's] plans for the coming year." It says:
Deliver first phase of united.com 2.0 by 2q 2015, including bundled ancillary offerings;
Some time in this quarter (by June 30), United plans to roll out a new website with new bundled fare options, which sounds like what American Airlines offers. Not that interesting. Moving on...
begin introducing dynamic award pricing.
Uh-oh!

"Dynamic award pricing" would mean that award prices change, presumably based on the cash price of the underlying ticket.