No question, it took a while for Google to make its Google RSS Feed Reader mobile as well but finally it happened and you can read your Google Reader feeds in the palm of your hand now since Google just released a mobile-friendly xHTML interface for Google Reader.
If you use the Google Personalized Homepage and have installed the Reader Homepage Module, it'll automatically show up on your mobile homepage. Simply go to google.com on your mobile phone's browser (or google.com/xhtml if you not redirected automatically) and click the link to "Personalized Home".
Personally I don't like the Mobile Google Reader too much but either prefer other browser based solutions like the NewsGator Mobile one or a dedicated RSS Reader for Windows Mobile.
Anyway, maybe you see it different and Google Reader is your preferred feed reader, if so it's good to know you can access your feeds from your Windows Mobile as well now and nevertheless, doesn't matter if I like the Google Reader or not, it's always appreciated if companies makes their services mobile as well.
Cheers ~ Arne