Spot HOTPopular Trends
Google Hottrends- most popular searches. Updated hourly.
Bing xRank - top searches on Bing. Updated daily.
Aol HotSearches - top AOL searches. Updated daily.
Yahoo buzz - buzz score is the percentage of Yahoo! users searching for that subject on a given day, multiplied by a constant to make the number easier to read. Weekly leaders are the subjects with the greatest average buzz score for a given week
Top AskIQ - most searched at Ask.com for the previous week
SEOmoz PopularSearches - aggregates search data from most sources listed above.
Delicious - most popular tags and bookmarks
Flickr tags - most popular tags for the last 24 hours, over last week and overall
StumbleUpon - most recent hot tags and most popular all time tags
Twittorati - top tags on Technorati and Twitter
BlogPulse - top phrases and blogbites from the previous day
Technorati Popular - popular searches and top 100 blogs
Amazon - most popular tags cloud used by Amazon customers
EBay pulse - most popular eBay searches