Since being brought into the Avengers in a big way Spider-man has never really been used all that well by Avenger writer Brian Michael Bendis. He has mostly just been there to boost sales and crack wise. I know a lot of Spidey fans don't feel like he should be in the Avengers, in fact I tend to hear three main reasons why people don't think he should be an Avenger, so let me take a moment to address these and why I disagree.
Spider-man is too much of a loner for the Avengers. Why is this a criticism, but nobody seems to mind Batman in the JLA?
Spider-man is out of his league in the Avengers. Hawkeye is an Avenger. Not every Avenger needs to be a Hulk or a Thor.
Being in the Avengers hurts Spider-man's 'Everyman appeal' Spider-man's everyman appeal comes from how he handles the situations he's in, not the situations themselves. Otherwise he shouldn't be a super hero at all.
Alright, all that out of the way, while I do love Spider-man being an Avenger I freely admit he hasn't been used well as one. This however was amazing (no pun intended). Spider-man held back two people with god-like power to save his teammates. He stood defiantly in the face of almost certain defeat and likely death and he even defeated them by goading them into attacking each other. And he made smart ass comments the whole time.
This is Spider-man the way he should be written.