I use foobar with an external playlist. My library is made up of 99% FLAC and I stream without transcoding.
When I load the playlist, all the tracks have a title of "stream?player=2&id12345&suffix=.flac"
This makes it difficult to select songs if you want to skip around. If you play the song, the tags populate correctly.
I think the coding work would probably coincide with the request found here:
viewtopic.php?t=3270&highlight=
I made a post here previously about this issue looking for help (there are differences between Winamp and Foobar):
viewtopic.php?f=2&t=8250