Rather than wait for more manufacturers to incorporate a PDMI port into their devices, an enterprising Streak user decided to mod the existing connector for compatibility with mini USB. The result is a little rough around the edges in the looks department (the Dell-branded cable clip that comes with the unit is used for the casing), but it's fully functional for connecting to a PC using standard mini USB cables and charging the device with some (not all) generic mini USB chargers.
Video of the modded connector below.
Thanks, X-Man!