Gmail – How accurate is the Gmail account activity listing

From Lifehacker on Make Gmail Check Your POP Accounts More Frequently

The solution, then? Your account needs to get more email. Naturally, though, you don't want to flood your Gmail inbox with new email just so you can be sure your POP account is checking at more reasonable intervals. The post suggests setting up some Terminal scripts with Automator to send your POP account emails on a regular basis, then filtering out those emails when they hit Gmail so you never have to deal with them.

If you're not on OS X or you don't love the Automator idea, you could probably offload the frequent emailing duties to some other web service. An active Google Group seems like a good option; you could sign up for the group, set the Google Group to send emails for all new posts, and then just filter the Google Group email out when it hits your Gmail inbox (via the POP inbox).

So many services now depend on the EC2 that it can be difficult to pinpoint which one is doing what but it's almost always legitimate when you see this sort of activity from Amazon.

I would normally say this was absolutely nothing to worry about but given the recent (and spectacular) crash of the Amazon cloud, you might consider a password change just to be on the safe side.