I think BiCon Treforest was the turning point - before that there was a large puddle of LiveJournal users waiting til they got home for their fix, but I think 2007 is the last time I remember us all seeming to muddle through with just a small room of internet-wired computers for people to dip into.
I haven't spotted any official comment either way from the organising team but I was noodling at the website for the venue and for all four accommodation blocks it lists among the features of the rooms,
"free cabled internet access"Sounds like we will have the internet, folks. But remember to bring a little ethernet cable with your laptop.
I do hope so. I can hardly type accurately for texts on my little phone, never mind trying to post updates to BiMedia and suchlike!