Jellyfish is calling itself a "buying engine". They help you find what you are looking for from a trusted merchant, and then promise to give you at least half of the money they earn for referring you to the store. Stores spend advertising dollars to lower your bottom line by offering cash back, the lower the price, the higher they are on the results list.
The really interesting thing about Jellyfish is the smack shopping! deal of the day. Each day they put an undisclosed quantity of an item up for auction starting at the regular price. Then every few seconds the price begins to fall until all the items are gone. Buyers will need to make the tough choice between waiting for the price to fall and buying before the item is sold out. Past auctions have resulted in 10 people getting 2GB iPod Nanos for free, and 50 portable DVD players sold for as low as $60! They even have a blog for the deals.
TenHunt.com is an online scavenger hunt where players race to answer questions to win a prize. Each hunt will require players to answer 10 questions by visiting sponsor sites to get the answers. The next hunt starts today at 7:19 PM Pacific. The winner will receive a 30 GB Video iPod.
Xuqa (pronounced zoo kah) is an interesting social networking/popularity contest/game. Players earn "peanuts", the in game currency, by playing poker, competing in modeling contests, filling out research surveys, and referring other users. They can use the peanuts to purchase privileges and tools to help them along the way to reaching the highest status level of 10. Players who reach level 10 are awarded with a $1,000 cash prize.