A Kewl Nifty Keen applet with numbers blocks:
http://www.arcytech.org/java/b10blocks/b10blocks.html
Read the stuff about it and there are links to lessons and activities. I haven't looked them over yet.

Ah, but the link that came from is good, too: www.mathcats.com
I clicked around a little and thought "oh, well, from 2000... " and then noticed the latest thing from Jan. 2007. To wit: manipulatives and how to make them. A "math toolkit" for every family.


http://www.mathcats.com/mathtoolbox/index.html

Here's an English link:
http://www.bayworld.net/ferlazzo/english



Got a rave review from LM-NET (school librarians' listerv where I lurk and glean all kinds of good stuff!)

Went to a professional development session on "how people learn" and hey, there were four faculty there (and four staffers likeme). Yup, a sad commentary - except not *that* sad. I work 8-5 so ducking across hte hall for a two hour session is part of my paid time, not something added onto it. And it was exciting to talk to folks with ideas about teaching and *connecting* and setting that fire.