Rachel, these aren't wahm suggestions, but I've either had personal exp. with these bags and cd's or I have talked w/other mamas who have and they come highly recommended:
http://www.expressivetoys.com/lebasudibag.html
http://www.expressivetoys.com/siliflmestba.html
http://www.expressivetoys.com/flmodibag.html
http://www.expressivetoys.com/skhopdanewfo.html
And here are some messenger diaper bags on ebags.com:
http://www.ebags.com/kids_baby/diape...=4001+20014977
A lot of people also like the LL Bean diaper bag for cloth, but it's not a messenger: http://www.llbean.com/webapp/wcs/sto...Search&feat=sr
http://www.expressivetoys.com/lebasudibag.html
http://www.expressivetoys.com/siliflmestba.html
http://www.expressivetoys.com/flmodibag.html
http://www.expressivetoys.com/skhopdanewfo.html
And here are some messenger diaper bags on ebags.com:
http://www.ebags.com/kids_baby/diape...=4001+20014977
A lot of people also like the LL Bean diaper bag for cloth, but it's not a messenger: http://www.llbean.com/webapp/wcs/sto...Search&feat=sr