iTunes purchase hiding

[iAmYou]

Sorry if this has been posted i did search.
You can now hide purchase of all types.

Also you can now hide installed apps on the mac app store.

 

[scott523]

Wirelessly posted (Mozilla/5.0 (iPod; CPU iPhone OS 5_0 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.1 Mobile/9A334 Safari/7534.48.3)

Sorry if this has been posted i did search.
You can now hide purchase of all types.

Also you can now hide installed apps on the mac app store.

Is there a way to unhide purchases? I just bought OS X Lion earlier today and I never knew that little (x) was to hide it...

Edit: Looks like the Unhide button showed up after the I installed Lion.