craftgrrl | Momma needs a brand new bag

I have searched the stores and the web and am not enthrawled with anything i've found so i am taking it into my own hands to make myself a new bag/purse thingy. I say "thingy" because i need it to carry my wallet, keys, cell phone, makeup bag, all the regular purse stuff like that PLUS a few diapers, wipes, maybe a compartment for a bottle to fit snuggly (everytime i just throw one in my purse it leaks and that sucks. Idealy, i would also like room for my digital camera as well. On top of all of this, i'd like it not only to be in a funky and playful fabric (which i have enough of in my own stash) but i'd like it to be messenger style as well....but not too big.
*sigh* maybe i'm being to picky.
I've searched pattern company web sites, purse retailers and all kinds of places and havn't found anything "cute" that will work.
So now i come to you skilled individuals. Have any of you got a pattern, seen a pattern or able to make a pattern for something like i have described?
Any help/direction/guidence would be SUPER appreciated! Thank you for your time :)