the id3 tag 2.3 seems to translate well on Limewire. If you use some other versions they don't seem to. I personally don't have that much faith in the Limewire labelling devise. A lot of info put in there seems to dissappear
Use a good ID3 editor, which I gather you are doing.
It may help you to share some other similar music, and if you enable chat (which does not work on the 4.12.6 Limewire btw) and ensure you have no firewall problems, then others can browse your share and find your mixes. (Enabling Chat does still, I believe, help)
Just in case you didn't know, your own music will not show up if you search for it on your own computer, unless some one else has downloaded it and is sharing it.
I hope this helps a bit