Freerock is excellent. Read the FAQ though because the KDE menus were hosed for me. The fix is simple and located on the FAQ. The current version is Gnome 2.10 and will work fine with the 2.4.30 or 2.6.XX kernels.
LiNuCe has a nice version of Gnome 2.8 as well, but it only works with 2.4.XX (I think).
I do not like Dropline.
My 2 cents.