Ability to access Disabled Section with Direct Link

Often these days we need to have an ability to access a disabled Section or Category Item on the Front-end without having it shown in the list among other Enabled Sections or Category Items.

There is a beautiful solution that Google Picasa has for this - Direct URL which contains some "key" for authenticating the user and showing him hidden by default content.

[B]Example:[/B]

https://picasaweb.google.com/dandrejev/MaksikGitara?authkey=Gv1sRgCJeZqfiPxL271

I propose we implement the same for Section (later for Category Items).

[B]Interface:[/B]

1. If Status is Pending or Disabled we show a new "Access with Link" field right after (below) that Status field
2. New "Access with Link" field will have a Check-box (enabled by default) and a Label field (which can be copied) with full URL to that Section.

[B]Functionality:[/B]

1. We would need to have 2 new DB fields ( in Categories table (and later for Category Items) to store the Status and the Authentication Key. I suggest calling them as AllowAccessWithLink and AuthKey, but I am insisting on these names.

2. Let's use some random Alpha-numeric (case sensitive) algorithms (nothing fancy) to generate (automatically) and save this keys. Keys will NOT change! Suggested length 15-20 chars.

3. One of hard questions is - which of the URLs to show:
a. with ModRewrite or without - I believe it should be based on current website settings
b. which language - default one for Front-end

4. Need to make sure if In-Portal performs a URL redirect due to forcing the HTML URL when user visits without one we need to keep AuthKey in URL as well.