Hi there, we were in Holguin area (Playa Covarrubias)last January (05) and three of us each called home once, only for a couple of minutes. Our bill was 12 cuc's so it cost us approx. $4 cuc's each. Our internet was really expensive for the time you get (8 cuc's for 1/2 an hour) and it was really slow as well, something you don't always know before you fork over your $. But if you can at least get access to your hotmail account, you can email a few people in that time.
Have fun!