We've set up an update site for our plug-in called CodingSpectator and we've added it to Eclipse Marketplace to make it even easier to install our plug-in (See http://marketplace.eclipse.org/content/codingspectator/). But, we are unable to find CodingSpectator in the listings at Help -> Eclipse Marketplace... on Eclipse Helios SR2.
Why isn't it possible to find CodingSpectator at Help -> Eclipse Marketplace...?
The search in the marketplace client is not the best - it does not always find plug-ins on their full name. However, when writing Coding as a search term, I could select the result as the first one provided in the "Further result" option.
Update: in 2011, when writing this post, I had some issues finding our plug-ins in the Marketplace, even with precisely writing their names. Today (10th Oct, 2016), I could not reproduce the exact behaviour. I don't know whether the issue was fixed by updating the search, or the indexes require some time to be updated with new(ish) plug-ins.