my boyfriend and i are both lucky to be able to leave skype on all day while we're at work. we don't talk every second of the day, but we're able to type messages to each other every half hour or so to update the other on what we're doing, when we're leaving for lunch, etc. it helps us feel more connected to each other's everyday life...i probably know more about his work life now than i did when he was living here in boston. it's also nice because when 5pm comes for me, i can close my office door and turn on the camera to say goodnight if i know i won't be home until after he's gone to bed (hate the time difference during the weekday!).
on weekends, if at all possible, we try to coordinate our schedules to overlap. we may both bring our laptops into the kitchen and he will cook dinner while i cook lunch, or we'll just turn the videocamera on while one of us is working or whatever. it helps to be able to see each other do day to day activities even though we're not with each other everyday. the cooking together thing has been the best!
oh, and flickr has been a great way for us to keep up with each other. we both have accounts and have been taking a lot of photos whenever we're out with friends, walking around town, etc. it's been a good way for us to share what we're doing when we're away from the computer.