If you're someone like me than you enjoy a good audiobook on your Android phone during your daily commute once in a while. And let me tell you, not all audiobooks are finely grained to about 3 minute files. Some entire books span 2 mp3 files.
Now imagine that while listening to chapter X from the first gigantic file, you run into a situation where you have to pause the book, perform your daily activities (world-wise and android-wise) and it just so happens that the music player (you are using) is kicked out of the Android's RAM.
Then, unless your player app knows how to save your progress, you're pretty much doomed to haunt the file's progress bar (which at several hundred MBs per file does not do you any good) to find that one part you were listening to.
In conclusion, these are tested apps that keep listening progress even if the app is forced out of memory
While there may be other apps (in that case, please throw me a comment below) that work, I can tell you this, the default (Froyo on i5800 in my case) music player does not solve our problem.
So, enjoy your listening,
Bye
