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Also: StrikeIron has raised $5.5 million in funding, Omgili has a new tool to help you find what's hot in the blogosphere, and HubSpot is making it easier to follow marketing leads.
Post-purchase price protection tracking service is good for consumers and retailers.
Get alerts telling you when free or discounted tickets using frequent-flier miles become available thanks to new feature on Yapta, a travel search and management service.
This browser add-on follows airfare fluctuations so you can get money back if you overpaid for a plane ticket.