O2 UK expects to push out Android 2.2 Froyo update for the Dell Streak this week
Even though the exact date isn't known for sure, at lease they're getting it in time for the holidays – as opposed to something worse like next year. With the update, it'll offer new features to the tablet-like device such as the ability to act as a mobile hotspot, turn-by-turn navigation via Google Maps Navigation, and the ability to update multiple apps simultaneously all from the Android Market.
In the mean time, just constantly keep an eye out on your device to see if that special notification pops up on your Dell Streak to confirm the update's availability.
source: O2 UK via Mobileburn