The main problem with WalkieTalkieVOIP is, it's not nice. It looks great, but its too complex. I figured it out in a few minutes, but computer idiots like my mom couldn't figure it out in a million years. Some people just don't speak that language. You should make an "idiot proof" mode, where to make a conference server is a button push, no boxes of random numbers (those especially scare tech idiots), and all you need is a user name. Type in someones user name and you join their room, simple as that. Just go through your app in your grandma's shoes or something, look for things that might confuse her and make them easy. Otherwise, WalkieTalkieVOIP is great, it just works. Keep up the great work!