Co-ed bridal showers are an awesome idea! I mean, how else can you make sure his friends aren't going to insist on going to strip clubs or getting crazy drunk to have the traditional 'stag party'? If you all party together you can have a great time and make the last memories of the single life that much more special I never actually pondered co-ed bridal showers when I was writing about the traditional bachelor/bachelorette parties on my blog How to Plan Your Cheap Wedding! but that's an idea I'll definitely have to explore...

Good luck, I hope you guys have fun!