Hi Greg,
I think it would be useful to be a little more inclusive on the Tool Shed listing "Latest revision: installation errors" and include repositories with tools missing tests, e.g.
http://testtoolshed.g2.bx.psu.edu/view/peterjc/ncbi_blast_plus/2d4757de6180
Some of the BLAST+ tools don't yet have tests (since they require functionality not yet supported), but at that revision at least there is also an installation error - which we're discussing here: http://lists.bx.psu.edu/pipermail/galaxy-dev/2013-May/014795.html
On a related point, it would be good to have the RSS feeds mention installation errors.
Thanks,
Peter