It may not what you want, but you can try Balance Jr in "Experimental" Bundle for moving back and forth. The screencast is here <http://subtlegradient.com/articles/2006/05/06/balance-jr-2-0-for-textmate-screencast>. This may be closest for what you want.

Takaaki

I think if you search the archive you will find some discussion about balance junior written by Thomas (subtleGradient) Aylott which sounds like it does what you want.

Brad