No, we have’t forgotten about Android 2.2, there just hasn’t been much to report since Google IO. At that time we were told Froyo would start rolling out “in a couple of weeks”.

When a select number of Nexus One phones started getting the Froyo OTA update we were very excited, we even showed you how to flash the leaked Froyo update on your stock or rooted Nexus One. This build, also known as FRF50, it turns out, was a release candidate, not the final 2.2 update.

After someone was able to get Froyo on an iPhone 3G, the news kind of settled down, and we waited.

What’s happened since then?

First, that special set of Nexus One users that got the FRF50 update automatically pushed to their phones recently got an update to that update: FRF72. At less than 2MB this update probably isn’t the “final Froyo” either, and is reported to contain a handful of updates geared toward the Browser app (and likely the notable slowness encountered when the Flash plugin is installed).

This update has also been leaked, and can be installed over the stock Nexus One Froyo update (FRF50). If that’s something you want to go you’ll need to grab the update.zip from one of these mirrors and place it on the root of your sdcard. Make sure you’ve backed-up up anything import, and proceed at your own risk.

Next, enter the new Froyo (stock) recovery:

1. Hold the Volume Down button and the Power button simultaneously until the white HBOOT screen comes up with the three little Android skateboarders

2. Push the Volume Down button to highlight recovery

3. Push the Power button to select recovery

4. Now you should see a caution sign and a little Android

5. Push and hold both the Volume Up and Power Button

6. The phone should now enter the new Froyo recovery mode (make sure the battery power is at least 50%)

You’re now in the (stock) Android System Recovery:

1. Scroll down using the trackball and highlight apply sdcard:update.zip ] press the trackball to select the update

2. Wait until it completely installs, which may take a few moments.

3. Reboot your Nexus One and enjoy Android 2.2 update!

While installing a leaked ROM update is certainly cool, all this update tells us is that Google is still working on Froyo and making progress to a final release. But when?

According to what looks like a message from HTC Support, their Desire (HTC’s version of Google’s Nexus One) will be getting an update to Froyo in “two weeks” (read more about that here).

While this rumored promise of “two weeks” sounds ironically similar to Google’s promise of Froyo’s release “in a couple weeks” following Google IO, it’s a hopeful sign. If the rumor comes from the source it claims to it means that Google is wrapping up the necessary changes to finalize Froyo. Once that’s done hardware vendors can start prepping Froyo updates for their devices. Luckily an update from 2.1 to 2.2 (Froyo) isn’t as difficult as the update from 1.5/1.6 to 2.1.

And for all of you in the CyanogenMod ROM camp: once Google has released the Froyo source code to the AOSP repository, Cyanogen and crew will begin incorporating it into their ROM.