If this does what the name implies (i.e. Jump around viewing different LinkedIn profiles on the behalf). Then it wouldn't be a good idea to use this unless you pay for LinkedIn. They have strict caps and once you view a certain number of profiles a month they start to cap your search results
@afhill sorry about this - I've updated our DNS settings, although it might take a while to propagate through. If you're still seeing a blank page please use the www version that Dan mentioned (www.profilehopper.com)
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