Outline hover effects for cells (works well in Firefox and poorly in Opera):

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sampletext sampletext sampletext	sampletext sampletext sampletext	sampletext sampletext sampletext	sampletext sampletext sampletext
sampletext sampletext sampletext	sampletext sampletext sampletext	sampletext sampletext sampletext	sampletext sampletext sampletext

Static outlines (works in all browsers supporting outline):

Some sample text

And then even more