This is a great video of Danielle talking about preaching, from a Preaching School organised by Cris Rogers. Pearls of wisdom from a powerful preacher.
And for more wisdom from a great female preacher, I'd also highly recommend Nadia Bolz-Weber's talk from last year's Greenbelt: Preacher Girl: the peril and promse of proclamation. Nadia is the mission developer for House for All Sinners and Saints in Denver, Colorado. £3.50 well spent!