11th position

[Tim Wong <Tim_Wong@xxxxxxxxxxxxxxxxx>]

Last night i was cooking dinner while playing harmonica on a rack that i use 
with my guitar.  I was just playing along with a CD and this song came on in 
Bb.  I was not aware of this (the last song was in G) and just kept on 
playing.  Then i realized i was playing completely different than I usually 
do.  I was still playing lots of low bent notes, but all kinds of different 
licks were coming out.  I use 1st, 2nd, and 3rd positions all the time, but not 
11th!!

Anyone use often or have some tips on 11th or some other good positions for 
blues?  Or just something to say about 11th?

I guess I will have to try an A - Harmonica in the key of G!!  I think......