I love the TFL website! It does an amazing job of find a route from A to B around London, using the various different forms of transport. However the site massively fails when I need it most!
I normally use the TFL site to plan a route, but by the time I'm out of the door I have totally forgotten what bus/tube stop I was meant to be going to, and in a world where no one has printers anymore I find myself trying to find the route again though my iPhone.
However this is where the TFL site has a massive FAIL, somehow it manages to choke mobile Safari, even when connected via WiFi. It's hard to tell the exact reason for this, it could be the large amount of JavaScript used by the site, it's use of XSLT, large amounts of POST data or something far simpler (post a comment if you know).
This causes the site to be useless when on the road. I used it last night, but by the time I got a result back I hard realised I was on the wrong bus and started to walk...
Until someone makes an iPhone version of the site, or better yet a native application you can use the, "large text version" which appears to be void of any styling or unnecessary content.
I have uploaded a web clip sized tfl icon you can use to put a link on your iPhone's home screen, by using the iphone bookmarklet we created a while back.