A few aids for practicing sight reading, and reading music in general.

 

Online Flashcards

Simple Note Recognition Slow Fast
Note Changes Slow Fast
G Gracenotes Slow Fast
D Gracenotes Slow Fast
Collections of exercises:
I strongly - STRONGLY- suggest getting a copy of Rhythmic Fingerworks, or The Pipers Helper exercise books.  However til then, here are links to some which have been posted online.

More Note Recognition
Game  -or- Regular
(Note: click "settings" and choose treble clef only)

YouTube Videos
http://www.youtube.com/user/NEACaledonians

General Music Theory

 
Rhythm Practice, See the notes, tap the rhythm  
Rhythm Practice, Hear the rhythm, write the notes