I think I know what you are talking about, and after skimming the web I have found a name for it. You must be referring to glass-door ambigrams!

http://www.maths.monash.edu.au/~bpolster/i.html#glass

Some sort of ambigram, at least. I can’t find him now but there is a calligrapher who does these in fine style. I remember a nice one he made for the band Aerosmith. . .

Google is your friend.

Hi Matt,
mmmh, I’m not sure what exactly you’re loooking for, but there are 10 results when searching typophile.com for ‘palindrome’

I am also looking for any info on illustrative text that is not a palindrome but does read backwards and forwards, if that makes sense
Are you talking about ambigrams?

If you talk about ambigrams ...

http://typophile.com/node/34044
http://www.johnlangdon.net/ambigrams.html

http://images.odeo.com/4/3/0/tacocat1hi-playerimage.jpg

http://ambigram.matic.com/ambigram.htm

the palindrome of Bolton is... Notlob

I was indeed talking about Palindromes, thatnks guys, always a help..

M

You may be interested in this rather clever use of palindromes...