At realclimate they have an article on Worldwide glacier retreat. There is a really cool graph showing how dramatically most glaciers have shrunk in the past century. (If I can figure out how, I will post a copy here.) There is also a link to photos of a shrinking glacier.
This is a very visual example of climate change and Global Warming. Does it prove mankind's involvement? Not definitively. Does it help us know what to do about it? Not really. Does this mean we should all move into the mountains and live on berries? Probably not, I think that would be worse for the environment.
The more scientific part of the article describes how the glacial measurements support other "proxy" measurements of historical temperatures. Since we don't have real temperature data going back more than a few hundred years scientists have found substitute methods. These methods involve things such as measuring tree rings. (Don't ask. I have no idea.) The only problem is that these methods are less exact and it is helpful to find other proxy measurements that support previous ones.
In other words the glacier data makes the graphs of temperature reconstructions more believable. (If I can I'll post a copy here.)
Anyway, I thought it was interesting and nobody in the blogosphere seems to have noticed.
Edit: The graphs are present but fuzzy. I don't know what causes that or how to fix it. Click on the graphs for large unfuzzy copies.
