I’m going with a 220–215 Dem House and +2 in the Senate, but anything in that range is possible.
What’s more interesting is “what comes next”. A unified Dem House might pass a lot of interesting things that die in the Senate. However, more likely is that they don’t pass much at all. Why? Well, Pelosi, in 2006, was genius at protecting her red-district Dems from having to take votes unpopular with their constituents, her eye being to 2008 and a Dem wave election that would take all both Houses and the Presidency.
I expect her to exercise the same caution again. Therefore, expect her to prevent controversial legislation from coming to the floor. This would mean a rather dull House focused only on investigations, which of course the White House will stonewall.