Please add detection of True Crypt containers *.TC files. Documention on True Crypt can be found at truecrypt.org
Recuva will find all instances of a deleted *.tc file during a normal scan. In a deep scan a deleted Truecrypt file will have no filename or header, so will be indistinguishable from any other block of random data. Recuva does not identify random blocks of data as files.
There are applications that claim some success in identifying tc containers - when run against undeleted files. I know of none that would attempt this on deleted files. I wouldn't bet tuppence on it being added to Recuva's abilities.