Entrecard has been my favorite since last month. It has boosted my traffic, created some opportunities to make money and found new bloggers with their amazing blogs. 
For my appreciation, I put the top ten Entrecard droppers on my blog.
PipeB Web Hosting
Thanks for the drops..
Entrecard has helped me to make money too. $11.95 from selling the EC, and $3 from buying my ads space.
Hey, thanks for the linky love! Have a good one and happy dropping! ;)