This is the oldest
(started 3/99), biggest (several million members) and best funded ($33,000,000) company, the mother of them all. They have been paying since June.
View my Check
--BePaid lets you watch interesting
full screen ads and get paid for doing it! With
AdVision control panel YOU choose which ads you want to see!
DesktopDollars has released their adBar! However, they will not start paying until they
get 500,000 members. $.50/hr for yourself, $.10/hr for direct referrals and $.02/hr for levels 2-6.
Pays you to read email..They send you
email every day with links and you get paid for the click through the links.
Epipo is one of the older companies. Their payrates are among
the best: $.60/hour for yourself, and $.10/hour for 5 levels of referrals.
Ignifuge is different! Get paid for making them
your homepage! $0.05/visit for yourself, $0.02/visit for directs, and $0.01/visit
for 3 more levels of indirects.
Get paid to surf with Paybar© . Great pay (up to $1.25/hour).
Pays internationally. Earn money by surfing and reading email.
They pay $.48/hour for yourself, and 25% of your direct referrals' earnings. No limit on payable hours.
Pays you to
receive email and you make money by referring others also.
No limit on payable hours. 4 levels of referrals; the rates are based on their advertising revenue 
Get paid to Surf