I made a TextMate bundle for remind. It's located here. It will open files with extensions .rem or .remind as remind files. It has syntax highlighting, commands, snippets, and a built-in help command.
Some things i like for remind, cause i ssh in and edit my reminders a lot:
vr='vi ~/Documents/rem.rem' to my main remind file that I usually edit.autocmd BufNewFile,BufRead *.rem set filetype=remind. So then you get syntax highlighting and stuff./sw/bin/rem -c | ssh me@mysite "cd wherever; cat - > cal.txt"