Hi Mark -- they need to submitted to the tracker. They do need to pass R CMD check and R CMD BiocCheck (after biocLite("BiocCheck")). They will be looked at by a previewer, though the previewer will be sympathetic to appropriate deviations from the guidelines, especially about data size and build times.
If the data is large (more than a couple of hundred MB?) then feel free to contact me martin.morgan at roswellpark.org about alternative approaches to uploading to the tracker.