We did most of the above, emailing, cam, chats, ecards, and sending each other songs. Another thing I would do was after him visiting, I would slip a card/letter in his carry-on bag for him to find on the plane, and then put a card in the mail the day he would leave to come to the US so he would have something from me as soon as he got back to Dublin.
June 2004 he sent me two snowmen Christmas ornaments; one had my name and one had his. I thought it was quite a bizarre thing to send someone in the middle of summer. I called him and asked him about it, and he said it was to let me know that whether it was me in Ireland, or him in the US, his goal was for us to be permanently together by Christmas and that we could hang up the ornaments together. I was in Ireland two months later.