I can personally recommend these: http://www.dfrobot.com/ http://www.jameco.com/Jameco/robot/robotstore.html http://www.societyofrobots.com/
Hemlock Stones writes "It has become almost impossible to use the "web" version of Time Warner Cable email at certain times during the day (mid-morning, early through late afternoon, high traffic times ?). After entering the email address and password you are greeted by long waits, and then a message saying the session has expired. Or, if you are very lucky it will take you to your email page and after you click on an email to view it, after a very long wait, it will kick you back to the login page with the "expired session" message again. If you are very, very lucky it will display the email and then when you click the delete (or move) button, after a very long wait it will kick you back to "session expired" again. It can take 30 minutes or more to read and delete 3 emails. Phone calls to "customer service" (wink, wink, nod, nod) will get you dancing around like crazy monkeys for a while before admitting that they know about the problem and that it could be fixed with a software upgrade but they have no idea when (or if) it will be done. This has been going on for at least a year now but has gotten much worse over the last couple of months. I'd like to find out what it will take to get it FIXED.
I have a Logitech C7 that still works, although it did need one ball transplant.