I am kind of interested in applications of XML.  To be sure, it was an interest in RSS which led me to write my random thoughts about things on this blog.  Recently, I blogged an update about the MathML spec.  I have heard of projects such as ChemML (CML) to markup molecular structure and reaction formulas, and a similar effort is in progress to markup music.  Last night, I came across another effort by way of the cool Google ads on my pickup basketball site InfiniteHoops.com (shameless plug, I know and don't care) -- SportsML, which aims to provide a method to markup stats and scores from all sporting events.  A SportsML feed of up to the minute pro sports stats is something which naturally would be a good fit for my particular situation and all the would-be ESPNs around the web.  If those SportsML guys are reading this, no doubt the next step is a SOAP based SportsAPI for stat keeping.  Perhaps in my next life I will have time to work on this.