Conformance
James Snell wants to know, so here it is. I believe that NewsGator Online passes the test, and so by extension, API clients. I say "I believe", because it's not clear what the intent of the test is, without viewing the source feed. It would be more helpful if the source feed simply made the summary and description a bit more self-describing. The first entry in the feed might be better written if the summary said "Summary: if your reader displays this, it's functioning correctly", and the summary on the iCal entry should read something like "If your reader displays this, it doesn't understand iCal". Test results should be stated in the positive, negative, or at least neutral, but not ambiguous - not as a question. I've noticed that with James' tests in the Atom Conformance Suite, it's sometimes difficult to determine from simply looking at an aggregator's display whether a result is correct. The Title Conformance Tests are excellent in this respect - simply viewing the feed in an aggregator tells you whether the aggregator is conformant.
I pretty much own the parser for that's used by NewsGator Online, the NewsGator API clients, NewsGator Enterprise Server, and NewsGator Inbox. So I take this stuff to heart. We may have bugs, but I try to fix them, not hide them.