Everyone seems to be praising the Senko rigged "Wacky". I propose you can rig a Finesse Shad or soft plastic Minnow the same. Fish on!
http://www.lunkerhunt.com/riggingTips.cfm
Sorry, I am not implying or condoning their use, but an "artificial" one should work great.
I personally thought nothing would eat the little invaders!
Here's some.. http://www.lunkerhunt.com/productDetails.cfm?prodID=LHPGG4
Did ya know, Great Lakes Smallies eat gobies? Imagine Walleyes do too!
Anybody check the gut contents of their Erie 'eyes?
"Hook& Look" TV show on WFN did a program about them. Kewl!