A frequent Penghu surfer friend of mine, if you are keen to get organised trip/s, he's a nice fellow to help, email to me if you want his contact.
some useful site... hope it helps..
http://www.sailing.org.tw/forum/recent.php (the official Sailing originization website of Taiwan.)
http://www.nicowsf.com/ (the most popular blog / chatter web site for short board and kite in Taiwan Main Island )
http://www.spot.com.tw/ (Tony Fish's Spot)
http://www.penghuwindsurf.idv.tw/ (PengHu windsurf and kitesurf)
http://www.liquidsport.com.tw/Web/VER.en/About.htm --> Windsurf shop and rental in Penghu
Happy sailing..