Hi Steven and

. You have a fine lens with the 17-85. With regard to a walkabout lens I use the Tamron 18-200 which I am happy with. I can't comment, yet, on the 18-250 but I imagine, from the spec, that it will be very similar too the 18-200. So...don't expect the bees knees in low light, it probably won't achieve it's full zoom and watch out for some CA at extremes. However, it's good value for money. Check out our
Equipment Reviews for specs and reviews of a number of suitable lenses.
With regard to uploading photographs you have two options. Firstly you can store images in your own personal
Members Gallery. You can link to those images in posts. Or you can store on your own webspace and link to the images. There are many threads to help you - have a look in the Rules and Announcements Forum and also in the Photo Sharing and Critique Forums. If you are still stuck post back