I'm with eroxx, Auidotap has been my savior since Dropbox bought, and then promptly folded, Audiogalaxy. I don't want to 'just try it' because if it doesn't work, I'll have to go through the hassle of downgrading back to pre-iOS 7, and since I'm holding onto to my seen-better-days iPhone 4 until I upgrade to the 5s, which probably can't even go back to anything pre-7, I don't want to be left in a lurch.
Having to figure out what portion of my 360+ GB library to sync over to the phone would be maddening. Paying for a subscription service like Spotify to have the privilege to listen to music I already own is nonsense, and besides Spotify and iTunes Match/Radio/Whatever would do no good if I wanted to listen to obscure out-of-print stuff I have, which is a major fraction of my library. Good luck finding 1960's Norwegian garage rock, late 1980's Japanese crust punk, or anything in between on those subscription services.
The ability to stream *my* music, not some other company's licensed stream-version, from my home server to my phone is critical. If Audiotap is confirmed not to work on iOS 7, that's a dealbreaker: no 5s, keep applying scotch tape to my iPhone 4 and hope the home button holds out until there's another viable alternative.
So maybe the next question becomes: are there any reasonable analogs to Audiotap that provide the same functionality?
-nil