I use an inline list on KamloopsCity.com using the following:
<!--[pagesetter_createFilter filter="date:lt:@now,enddate:ge:@now" filter1="date:ge:@now" assign=listFilter]-->
<!--[pagesetter_inlinePubList tid=39 tpl=smallcolour filter=$listFilter pubcnt=15]-->
This assumes that the start date for your event is "date" and your end date is "enddate". I'm also specifying the template (smallcolour).
To use the pagesetter/list block I assume that you could use the filter:
date:lt:@now,enddate:ge:@now&date:ge:@now
In case you care, this means that we only display events that have already started but also end some time in the future, and events that start today or some time in the future.