Tapatalk is by far the best / easiest / quickest way to use a forum and only requires the installation of a plugin to the site rather than creating a whole new template that only works well on x by y resolution.
There is nothing more irritating than getting sent to a websites "mobile" site which is optimised for a nokia 3310. If you have a smart phone you should absolutely definitely give tapatalk a go.
Also have a desire hd