here is a list of active tg webcomics
all of these comics have had a release within the last month or so
http://www.exiern.com/ think conan only tg'ed
http://www.tfsnewworld.com/ guy wants magic so he contracts moon goddess and gets turned female
http://www.sgvy.com/ magical girl fanboy becomes one
http://www.egscomics.com/ many changes many tg's
http://darkreflections.exiern.com/ darker version of exiern
http://www.drunkduck.com/Transcerebral/ scientist wakes up as a girl
http://www.misfile.com/ angel changes some files in heaven while hiding his weed this turns a guy into a girl
http://www.cheercomic.com/ is wotch main five characters were boys
http://jeaniebottle.com/ 2 girls find a lamp one becomes the sexy genie inside
http://somewheredifferent.webs.com/index.html hasn't got to tg yet
http://ninmunanmu.com/ girl give guy at a concert magic redbull turns him female
http://www.mahouohno.com/ spell gone wrong turn boy into female dragon half