There is a nice review talking about the comparative advantage of TextMate over Emacs at macdevcenter.com:
http://www.oreillynet.com/mac/blog/2006/05/ emacs_est_mort_vive_le_textmat_1.html?CMP=OTC-13IV03560550&ATT=Emacs +Est+Mort+Vive+Le+TextMate
Best, Mark