Restrict market updates to WiFi network In order to save some volume on my data plan, I'd like to limit updates from the market to the times when I'm connected to a WiFi. And as every good geek, I want this to be automated, in other words, if I am connected to a WiFi network, check and install updates from the market (for those apps that I allow to automatically update). Is there a way of doing this?

I'm running Android 2.2 on an HTC Desire. If it helps, I have Tasker installed.

Update: I don't want to change the autosync settings. 

Update II: I'm not rooted and am looking for a "stock" solution.
This will only work if you're rooted, but DroidWall is a really good front end for Android's iptables.  You can filter access to data based on WiFi and 3G to just about anything in your phone (including the Market) that could request it.