Most Motorolas can use DUN since the V710/E815 from many years ago. It's just a matter of dialing to #777 or #DIALUP. Other than the true smartphones, I think the Dare is the only Rev.A phone, but I might be wrong (everything else being Rev.0, of course).

I get around 500 kbps down / 100 kbps up on an LG enV2 and had also used an LG Chocolate and Motorola E815 with similar results.