The Hyatt point purchase deals on April 15 are as follows
24,000 Hyatt points for $250, ~1 cent/pt
30,000 Hyatt points for $333. ~1.1 cent/pt
36,000 Hyatt points for $415, ~1.1cent/pt
69,000 Hyatt points for $778, ~1.1 cent/pt
The deal becomes sweeter if you have an Amex card as purchases with Amex card are given a 10% discount on the aforestated price.
Note that to buy points from Hyatt itself, you have to fork out 2.4cents/pt and are limited to 40K points in a calendar year.
There is speculation that this purchase may be coded as a Travel purchase and thus putting it on the Capital One venture card may make this purchase totally free. However, you would be losing out on the 10% Amex discount in that case.
Another interesting deal in the Discover America promotion is 3 nights in Comfort in for $156. The normal prices at Comfort Inns are ~$80 per night. So this gives you 3 nights for the price of 2, a pretty good promotion if you are headed out to some remote national park this summer where you would not get the upscale hotel brands.