you can convert back but with lost information during MP3 conversion. portable iplayers now have a capability of playing lossless formats for small purchase price of an application. there are many sites that have lossless downloads
Downloading & Converting Music
Tell me if I understand this correctly. MP3's have information that cannot be retrieved if converted to WAV or FLAC format. So, it is better to rip the songs off CD than download the music since most downloads are in MP3 format (except the high quality sites like hdtrack)I use a PC. Do any sites allow download in lossless format?