Flying into Gothenburg would be the most direct path, yes. You take a shuttle bus from the airport to the train station and you are on your way.
Stockholm Arlanda is pretty good also in terms of connectivity. You take a 15 min train to the central station and you are then ready to board your train direct to Skovde.
I'd go with whatever is the cheaper airport is to fly into (Toronto -> Stockholkm fares seem very reasonable atm)
Yeah, the best airport to fly into would be Gothenburg as from the main station, it's only about 1 hour by train to the ESA venue.
Linking the video in the comments box ¤should¤ be fine. Another way of doing it perhaps is create a YouTube playlist and link to that.
Hotel thread will be coming at a later date! This thread is purely to discuss how you are going to reach the event and other things based around travel! :)
HYPE
I agree with the consensus that custom themes are a pretty bad idea to have on the site. I've seen quite a few examples in the past where text is outright unreadable on pages, users have silly images applied, etc. Is it meant to be a throwback to geocities? :p
On that note, there should be double click prevention. Most big discussion board software has it