I've recently launched a sub-domain under thekfactor.info called dev.thekfactor.info (which redirects you to thekfactor.info - i am working on that). In short, this is dev.thekfactor.info:
As engineers you might have gotten the habit of making notes of something you learn/hear, wishing to recollect them later. it would most likely be in a piece of paper and, in most cases it would be lost forever! you may not even remember you learned/heard something new! If this is you, http://dev.thekfactor.info is for you!!
Here you will be able to make a note of whatever you want. you could have a private note, a public note or a protected note (if you are an engineer, you know what i mean already! :) ) for example you could add another user to your group and have them alone view some notes (protected!).. and much more!
Also, there is a section to update users on what's in your mind. (ya, ya, kinda like twitter! )
Try it out friends and let me know your opinions...!!!