The following change opens mutt in a new iTerm tab of the current terminal.
diff -u /Volumes/MailtoMutt 0.4.1/Source/Mutt.m ./Mutt.m
--- /Volumes/MailtoMutt 0.4.1/Source/Mutt.m 2004-05-30 18:25:20.000000000 -0500
+++ ./Mutt.m 2007-09-08 13:19:55.000000000 -0500
@@ -13,7 +13,7 @@
NSDebug(@"Opening mutt with file %@", path);
/* create the source to the script */...
2007-09-08 18:27:16 UTC in MailtoMutt.app