After reading some other discussions regarding similar issues with Airplay, I can't seem to find a working solution.
I'm having trouble getting my Apple TV to show up as a speaker in Airplay on my iOS devices (iPad and iPhone 4). The strange thing is, it does show up as a speaker on my Macbook Pro in iTunes. From iTunes on my computer, I am able to stream my music to the ATV.
Here's what I've tried so far:
-Updated all the latest software for each device
-Rebooting my devices, ATV and my Time Capsule (which I use as my network router)
-Ensuring that the ATV is turned "on" as an Airtunes speaker