Similar to the request for a giant "pause" button (see: Pause button for outbound alerts), it would be useful if Alert Central could consolidate identical alerts. If there's a constant interface problem, routes flapping, or other up/down/up/down scenarios, de-duplicating alerts would be helpful.
If anyone has thoughts on HOW you'd like to see them de-duplicated, or what kind of configuration you'd expect to see here, that'd be awesome to know.