Apparently this just happened. He's with FC Lustenau -- an '89 who played at Cornell: http://www.fc-lustenau.at/index.php?id=71 Snip: Lannon went on trial with FC Lustenau back in July, and what began as a two-week trial eventually became a full-year contract offer.http://cornellbigred.com/news/2013/1/17/MSOC_0117132438.aspx It's a second-division club.
Debuted as a late sub in midfield vs SC Rheindorf Altach FC on 3/15: http://www.transfermarkt.co.uk/en/sc-rheindorf-altach-fc-lustenau/index/spielbericht_2228521.html
Don't know if he's moved on, not signed, or something else, but he's not currently on Lustenau's 13/14 first-team roster.
Lannon appears to have landed at FCA Darmstadt, where he is a teammate of Jake Keegan. http://www.geomix.at/verein/1-fca-darmstadt/team/1-mannschaft/
On the roster at SVN 1929 Zweibrücken, Tyler Miller's new club: http://www.svn-zw.de/roster/8/1-svn-1929-zweibruecken