$2.5 million is a nice modest take for the weekend. It's nice to see that FF2 didn't cut into Spidey's numbers (not that there is much to cut into considering it is in the latter half of its run).
I was looking at trends among the Spider-Man movies for box office, after their 45th days at the box office (Sunday being Spidey 3's 45th day), they went on to gross these additional amounts:
Spider-Man: $21.5 million
Spider-Man 2: $15 million
Spider-Man 3: ?
Spidey 3 is looking, based on the numbers, to gross a remaining $10 million. I am confident in saying it WILL cross $340 million, albiet it will crawl there.