It was hard to find for a while, but the Slacker G2 dock that's known to work with the Dell Streak is readily available on eBay again. Seller heyitsdiane currently has "more than 10" of the still-sealed docks available for a Buy It Now price of $15.99 plus shipping from Washington state to the rest of the US, Canada, Australia, Mexico, and the United Kingdom.
As you know, the G2 dock can be used to charge and connect the Streak to a computer; with some modification, it can also put the device into Dock Mode (i.e., automatically launch the clock app) as soon as the connection between the PDMI port and jack are made. So while it may not have an HDMI port like the official home dock or let you charge a spare battery like that unbranded one, it's undoubtedly an inexpensive, stylish, and capable accessory to consider for the Streak.[eBay]