A quick note to say that I’ve just uploaded to CTAN updates for expl3, xpackages and siunitx. There are some low-level changes which mean that these have to be updated together. So if you grab one of them, grab them all!
The CTAN Team are currently testing a new upload system. There are several things going on with this new approach. First, if your material has been uploaded before then you can find it on the list of known packages, so various pieces of information are automatically available. Secondly, you can see the meta-data about your upload, for example the short README-like text you see in the CTAN database. That means you can correct/add to the entry, and hopefully makes Robin Fairbairns life a little less busy!
The default page for uploads includes a list of all of the packages that CTAN contains (more or less: I’ve not checked the entire list!). There’s also a page you can use if you know the package name for your upload. I like that one, perhaps as I know the names of all of my packages and the aforementioned list is rather long!
A quick note about TeX Live 2010. After a while in pretesting, it’s now released and so new updates are appearing. I’ve just updated my system (I’m actually on a campsite!) and all seems to be working. Hopefully the DVDs will turn up soon enough and will be off to members of users groups, such as UK-TUG. As I’ve mentioned before, this has some new refinements such as built-in shell escape for EPS to PDF conversion, so the update looks like a good one to me.