Plaxo versus LinkedIn

These two sites are quite similar however I am partial to the Linked In site. I have been on LinkedIn for quite some time now and have recently begun to use the site more often with my current professional role. One of the things I noticed right away was just how many more users there are with LinkedIn as opposed to Plaxo. Also the ability to join groups and instantly upload a resume to your profile is a nice draw I did not find readily available with Plaxo. Honestly since taking this technology course I have begun to realize that you can never be too connected so using both sites is a definite.