On January 22, 2012, the cost of the first-class stamp will rise to $.45 See the USPS Media Release here.
.44 stamps go to .45 (1 oz letters)
.30 postcards go to .32
.80 letters to Canada or Mexico go to .85 (1 oz letters)
.98 letters to international destinations go to $1.05
If you mail a lot of letters, you may want to get your forever stamps today at the .44 price.