I don't skype or IM, so I may not be the best person to weigh in , but personally, I find such things very annoying. I hate when people IM me, ESPECIALLY on the dating site while I am checking my mail.
Maybe he did it initially just to get your attn, but doesn't love that media and actually prefers emailing, texting and calling?
I don't recall the back story but have you met the guy in person? Have you spoken to him on the phone? If you have been enjoying his company via skype or whatever, why not dispense w/ all this other stuff and just go out w/ him to see if there is chemistry?
(If you aready covered this, sorry. Point me to the post so I can read the history.)
eta -- I went back and looked. I see he lives clear acros the country. Not sure what to say about that; I don't do the long distance thing. Is that something you both said you are open to?