Thanks, BobR, for the compliment on my portal.
The mobileread blog has been on my portal for a while now under Technology/Mobile Phones/MobileTech/Mobile Blogs which uses
http://winksite.com as it's rss agregator.
Today, I added the mobile edition of the mobileread forums under Technology|PDA. Because the forums require a login, my html2wml proxy, which doesn't yet support forms or cookies, can't convert the forum site so you may not be able see it on your phone.
You might consider allowing read-only access to the mobile forums for unregistered users like you do on the main site. I think that you are losing the majority of mobile users who causually discover your mobile forum site while browsing on their phone or PDA only to find they can't enter the site. Many more of these users would be motivated to register if only they could have had a taste of how great the mobile site is.