I posted today a developmental version of Kaviar (120419).
This is a much revised version of the Kaviar code, now based on tabix. Kaviar now knows about indels and structural variations, though these are not yet exposed through the web interface. The json output option is temporarily disabled (for the new version - it is still available for version 111121).
The data set is also significantly expanded, with some additional whole genomes (e.g. Mike Snyder's) and lots of exome data from the NHLBI Exome Sequencing Project. This is a very significant contribution: the allele frequencies in the exome are now of very high quality.
Feedback and bug reports are most welcome.
-- Gustavo