Below is the link to the nvidia flash utility, the nvidia boot recovery drivers and image file p2 through p24 that will provide recovery to your Dell streak 7 tablet to the latest 3.2 unmodified image.
The link will have to be pasted since although I have visited often, I have yet to post very much, apparently 8 posts are required for a link and 10 posts to post to the developer page, thus you find my copy and paste link below removing the spaces between the ws' and the coms'.....
w w w .sicksubstance. c o m/Files/Streak7_3.2-Dell_img.rar
Download from the above link and extract.
-Place the nvflash folder into the root of your c drive
-Place the tablet in boot recovery mode (vol down and vol up while plugging in the tablet while it is turned off)
-Open up a command shell (if using vista or later make sure to run the shell as administrator)
The restore takes a bit, once it is complete power down the tablet via the pin hole, power back up and enjoy!
NOTE: If running windows vista or windows 7 be sure to boot your computer in the unsigned drivers disabled state. During boot up before the windows logo appears press F8 and choose disable unsigned driver requirement option.
I hope this helps some of you!
Fellow Android Developer