Gip,
Likely your IT guy has certain "job time waster" websites blocked, like MyFacebook and Photoshack and such. I'm lucky because I AM the IT guy at my job!
Photobucket is my choice, but currently I'm a bit PO'd at them. I've had my free account suspended due to "inactivity". Which means I neglected to log onto their site for a 90 day period. I'm am currently negotiating with their tech people to reconnect me to the real world.
Normally I would post the link to my tutorial on Photobucket, but until the links are reconnected, there is no point. Since the tech team appears to be working 24/7 I hope to have the issue resolved shortly. When I do I will provide the link. IF I can figure out how to post pics, you'll find it a snap!
Organization is a good idea, as is renaming the pics in a consistant manner. This requires a bit of forethought, and is well worth the time to plan ahead. Phil is (as usual) correct that renaming or moving them after posting will break the link.