Apparently Jan is riding under the pseudonym “Max Kraft”, or Max Power. Including the Tour of the Dolomites.
jan ulrich - Google Search
Inner Ring Twitter
Edit: Translated article: http://translate.google.com.au/translate?hl=en&sl=nl&u=http://www.ad.nl/ad/nl/1018/Wielrennen/article/detail/2845896/2011/08/11/Jan-Ullrich-fietst-onder-pseudoniem-Max-Kraft.dhtml&ei=OOFETq2rHsvJrAfxi8nmAw&sa=X&oi=translate&ct=result&resnum=1&ved=0CB8Q7gEwAA&prev=/search%3Fq%3Dhttp://www.ad.nl/ad/nl/1018/Wielrennen/article/detail/2845896/2011/08/11/Jan-Ullrich-fietst-onder-pseudoniem-Max-Kraft.dhtml%26hl%3Den%26biw%3D1366%26bih%3D643%26prmd%3Divns