In Ubuntu you can set nearly the same aero glass effect to window borders with alpha transparency as available in Windows 7.
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Press Alt+F2 to bring up "Run Application" window.
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Type gconf-editor into the box, click "Run" to bring up Configuration Editor.
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Browse to apps > gwd, look for "metacity_theme_active_opacity" on the right panel.
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Change the value in "metacity_theme_active_opacity" from 1 to 0.75 (or smaller such as 0.5 for more transparency).
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Then go to System > Preferences > CompizConfig Settings Manager
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Select "Effects" from the left panel.
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Tick "Blur Windows" and click the "Close" button. (Note: default values in Blur Windows can be applied.)
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If
the aero glass effect doesn't work, check if you have updated your
display driver. Go to System > Administration > Additional
Drivers, activate the recommended graphics driver and restart the
system.
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Ubuntu Panel