I just finished this project that i came with after being tired of always adding small LED's and buttons on a breadboard, besides time consuming there was also the connections reliability.
So i came up with this friendly Proto I/Os board that has 8 LED's, 6 buttons, one buzzer and a DS1820 temperature sensor, and alines perfectly onto a breadboard including the power rail.
You can find the entire project with eagle files, and the link to the Osh park Proto I/Os pcb, in Electropepper
Here is also a small video of it.
I hope you like it and it's helpfull to anyone.