Hi There!
I've got a copy of Passporter 2005 and there is 2 mentions of the Electrical Water Pageant. From Disney's Fort Wilderness Resort it passes by the beach there are approx. 9.45pm. The second mention of it is from Disney's Polynesian Resort Beach at 9.00pm.
I also found a page about it on this website:- http://allearsnet.com/tp/ewp.htm
You know - I've never seen it, but now that I've read your thread - it may well be worth a view! We're off to MK for 2 days and on the other night from when we'll see Spectromagic and Wishes - we could go out and walk along the footpath that runs just past the monorail station and watch it from there. MK is open till 11pm the first night we go and 12.00am the second! Can't get over the hours!