Another Tech Bubble

Are we heading for another tech bubble? The latest technology funds and Internet start-ups have been given very substantial valuations. For example, valuations for Facebook have quintupled within the last 2 years and Groupon's estimated value increased from $1.4 billion to $25 billion.
What are the implications of this?

Read more at: http://www.nytimes.com/roomfordebate/2011/03/30/are-we-heading-for-another-tech-bubble?ref=business