I've been keeping an eye on WI election news so far today. Looks like high turnout in Waukesha County (Republican stronghold), but also high turnout in Madison (liberal friendly).
A few polling problems in MKE, but nothing extremely detrimental. It appears for the most part polling station are correctly telling individuals that they don't need ID to vote.
Links:
High Turnout in Brookfield (Waukesha County)
Reports of busy polls in Madison
#WiVote