I've only just discovered lmms and have had a quick play around with it (I'll be digging my MIDI keyboard out this weekend!) but I was wondering if there was any chance of getting it supported by PortableApps.com? I installed it onto my USB drive and it did load at work, but none of the sounds seemed to be working correctly. I would love to be able to work on music in the office (during lunch breaks of course ).
there already is a beta version, and it works perfectly
here you go!
http://portableapps.com/node/18823