In reply to Mick Ryan - UKClimbing.com and others: I regularly use mobile phones to access UKC so bandwidth is still a great issue. People who make crap comments about people having 'slow connections' are completely missing the point.
I'm sure Nick will agree with me but please do not even consider put silly pointless things like inline images or avatars on the site that will just slow thing down.
Inline images are completely unnecessary anyway. For desktop browsing, if people haven't moved to tabbed browsing then it shouldn't be up to UKC to make up for the fact they don't keep up with technology.
Some better link handling code that truncates the display portion of long links would be very useful.
As for avatars, why? By all means, consider some method of displaying inline thumbnails of people's profile pictures resulting from a click on an icon etc. but don't mess up the content with un-neccessary stuff being loaded and displayed all the time.
Other ideas:
Online climbing video library - Video is definately the future! Might have to be subscription or more heavily sponsored for the next few years. However I can see in 10 year time, not only will you be able to find pictures of your sport route or boulder problem, you'll be able to download a video of someone climbing it.
Better geographical interfaces linking logbooks to the googlemaps stuff.
Merging the clubs and walls databases with the BMC - Completely unnecessary duplication between the two organisations.
Better interfaces leading into the articles section. Currently not too bad but will become more of an issue in future assuming the number and quality of articles keeps improving.
Loads and loads of stuff needs done to the logbooks section.
I'll no doubt think of some more stuff....