Anyone else notice how some apps just disappear from the Market? 

I'm not talking about spam apps or rubbish apps that don't actually work.

What happened to the Starfield and logcat live wallpapers? I have the APKs backed up and continue to sideload them when required, but they aren't visible to me in the Market anymore. Is it just my phone? (Galaxy S) or are they actually gone? AndroLib and Appbrain say they are gone.

In the case of Starfield, someone else ("pook"?) tried to release one a couple of weeks ago and it, too, disappeared in a couple of days after barely 1,000 downloads.

I'm thinking there needs to be a register of desirable - but disappeared - apps. Many of them can be found on blackdroid.net....but not all of them. Appbrain do have a lag period in which a disappeared app is still in their index, but noted as "No longer in the Market". But these disappear, too, after a few days. 

Having thinigs disappear without any notice or explanation creates uncertainty and undermines my trust in the Market as a reliable source for the software I want. I now back up everything - paid and free - in case it is "disappeared".