[majestros]

TuneSync does have the option to only sync checked songs. I am currently using it and it is awesome, and wireless syncing whenever I am near home computer, and woot!

[packpackpack]

I have uploaded approximately 18,000 songs to Google Music Beta. I have not been impressed at all with the service. Many, many times with full wifi strength songs will cut out and skip to next song. Frustrating. I have also received many script errors while listening on a desktop. Their answer? use a different browser. I know, it's Beta. but still...DoubleTwist? SUPER slow to both open on your PC and to sync with iTunes. I don't have that lond of patience. try TuneSync.

[Androidceb]

I just loaded up the full version of Tunesync. I needed more that the 20 song limit on the free version. Works great just had to manually put my computers IP address in synched right up.