I should have mentioned the post was in answer to DaveW's post.
I was referring to the specific school scenario. By thin client solution, I meant have a terminal server on the network with shockwave installed. (This would be an x86 box). The acorns could then use RDP to run a webbrowser in a session on it, allowing them not to be replaced. It might be possible for a linux based server to do a similar job, but as I understand it you would need crossover to allow it to run the windows shockwave.