Podcast Pickle is a great site. There’s no argument there.
One vidcast in particular that I like is Kidcast.tv – Free Children’s IPTV Network. They do things that I have often wanted to do, like take apart a cell phone. It is much less cost-prohibitive to watch this vidcast than to do it yourself. 
Okay, I used the title to get the nerdy Contact joke out of the way.
The Vega Science Trust has a great little site with, I am sure you will not be surprised, videos. Interviews, workshops, mini lectures, and even printables to go with some of them can be found in the Schools section. They have interviews with Nobel Prize winners, too.
The site won’t win any design awards, but it works.
If you would like to suggest a media resource, I would like to know about it, use the contact form.
All opinions, criticisms, and foolish statements herein contained are my own, although I am temporarily insane, so I cannot accept responsibility for any negitivity that might arise from them. (In other words, sometimes I am quite harsh in my criticisms, but it is only because I care so much.)
Free converter – make a file a PDF
I really like pdf files. The reader plugin is widely available, and the file usually looks presentable, it’s easy to print, etc. However, the cost of buying a good program to convert your files into a pdf can be quite prohibitive, then it might not handle all the file types you need, too. Well, if you aren’t going to convert gobs of files and the few files you do need to convert are less than a MB, then you are in luck. Neevia Technology has a free, yes free, online PDF file converter for you to use. For those once-in-a-while needs, it is great!! Thanks Neevia.