Its good you guys got to talk on civil terms. As long as she keeps giving the appropriate signs then go ahead and slowly inch back towards working on the relationship. Be very careful of falling back into the "old relationship" too quickly as the WAS may get cold feet. So far things look really good though, good luck.
"Don't chase people. Be yourself, do your own thing, and work hard. The right people - the ones who really belong in your life - will come to you. And stay." ~ Will Smith