ok - got some more links thanks to blogger 'New Girl in the Air' here.
For me it’s too time consuming to do the surveys and the ‘money’ you earn must be redeemed for miles/points/gift cards at a pretty bad exchange rate. However, you can choose to only sign up with the different e-rewards partners and collect the sign-up bonuses which are usually instant miles. You should first sign up for all the bonus emails with e-rewards partner sites and once you get the invitation from the partner to e-rewards just be sure to use a different email address or the gmail hack.
Right now there is an e-rewards bonus offer of 4,500 Club Carlson points for registering as a new Club Carlson member. The T&C say you need to be an existing e-rewards member (use the link above if you are not) and you need to use your e-rewards email address when you register with Club Carlson (not sure if this is true – in fact I doubt it is!) and it is for new Club Carlson members only. You can exchange Club Carlson points into miles at a fairly awful rate of 8 to 1 so the above bonus would only equal 500 miles. It only takes 30 seconds to sign up and if you sign up for a new account ten times using the gmail hack you could earn 5,000 miles for 5 minutes work. YMMV
Rumor has it Club Carlson will be giving away 50,000 points in a repeat of the Big Blue promo to each person who registers and stays a night at a qualifying hotel. More on that when the details are published. Update: Rumor confirmed here .
Check out the rest of my travel hacking tips here