I used to vs. I’m used to

Sam: I'm not used to speaking in English.

Joe: I used to be the same, but now I speak English so much, I'm forgetting my own language.

What's the difference in usage? The first statement is related to the present and what you are accustomed to doing. The second statement is to compare the past with the present.

For a video explaining the whole thing, go here:

http://www.youtube.com/watch?v=ulezklvGaQk

For practice, here's some sites to go to:

http://www.myenglishpages.com/site_php_files/grammar-lesson-used-to.php

http://www.grammar-quizzes.com/usedto.html

http://www.englishexercises.org/makeagame/viewgame.asp?id=2448#a