examples
The best example I have ever come across is the phrase 'street seller'.

This becomes 'settes reller' in which all the vowels are identical and the first six letter string has all tinny consonants and the second all woody consonants. they are both palindromic too which is a great bonus - did I tell you that I am obsessive about palindromes too? and anagrams and spoonerisms and word riddles...
in fact any sort of puzzles involving letters, words or numbers.
It's sad but true
(Stunt slug If God existed I'd want to fight him, Mon 19 Dec 2011, 0:59, Reply)