I've decided to move my samples to the "official" StreamInsight sample site on Codeplex, http://streaminsight.codeplex.com. The advantage is that there they will be co-located with other useful StreamInsight samples.
My currently published samples are:
Twitter input adapter
Yahoo Finance input adapter
I'll keep updating with more samples in the future.
Are you running StreamInsight in a non-English speaking country? Then you may have run into the problem of getting the exception "Input string was not in a correct format" from StreamInsight when you try to run a query that contains a non-integer number. The problem is that some countries (like Sweden) use comma as decimal separator instead of a dot and that causes problems with the XML serialization/deserialization within StreamInsight. I've reported this as a bug to Microsoft and you can read more about it here.
Workaround?
Yes, I've found a workaround. You can change the CurrentCulture of your thread just before creating your query templates or calling ToQuery():
Thread.CurrentThread.CurrentCulture = CultureInfo.InvariantCulture;
After creating your query tempates or instantiating your queries you can change the culture back to your original again if needed.