My communication with my parents varies....sometimes I talk to them a few times a week, sometimes I will go for a few weeks without talking to them. We all just get busy with life and that's ok. I actually talk to my mom more via email than over the phone - just shoot her a quick one to see how things are or how their weekend was....if H & I go away on vacation, I just let my parents know in case, god forbid, something happened while we were away and at least family knows how to get in contact. For my family this works....
We live closer to my IL's so H talks to his parents probably more often than I talk to mine, but even that varies too, depending on how busy everyone is. We see his family more often than we see mine , which bothers me a bit, but I´m sure we'd see my family more often if we lived closer too. I´m actually glad we live close to at least one set of parents because when the hurricane hit NY, H & I were away and had no way of knowing if our house was ok....his parents were able to come by and check up on the house for us....