Andy,
So far, LabVIEW Embedded has run on VxWorks, eCos, Unix, Windows Console, VDK, DSPBIOS, and QNX. The kernel version of uClinux is not likely to have an effect on the experience of using LabVIEW Embedded, unless there are specific improvements in the kernel that you need to take advantage of.
--
Michael P
National Instruments