My parents are very close to my kids. They get them at least twice a month for the weekends (they call and ask for them). They would drop anything to watch them if we needed it. They're a hour away or we'd probably see them more often. I talk to my mom several times a day, so she talks to the kids daily.
Jason's mom & step-dad are 6 1/2 hours away, so we don't see them as often (every 2-3 months), but they are very involved with the boys' lives. They call a couple of times a week to talk to them, and when we go over there, she always makes us go on a date so she can keep the boys by herself a few hours. We went on a cruise a couple of years ago, and she kept the boys the 8 days we were gone. Next year, she said that she was going to start taking them for a week every year - either during spring break or during the summer.
Jason's dad and step-mom are pretty much non-existant in all of our lives. We hear from them on Jason's birthday, Father's day, and Christmas. The boys have no clue who he is. They're closer to their great-grandparents than him, and two sets of them live in California! What's sad is that the kids have seen them more. Oh well... My great-grandfather sees them about once a month or so. He likes to spoil them, but they're still a little guarded around him for some reason. My grandparents lived next door to us when I was growing up, and I practically lived at their house! My mom said when I was 3-4, I used to sneak out of the house in the middle of the night and go over there to sleep, lol If my kids did that, I'd freak out.