when I log in, no artwork shows up on the main page. Even when I go to my favs nothing shows up. Even when I visit another artists page, no art shows up. Is this just happening to me?

Two likely scenarios here, slight clarification of exactly what you mean is required:

• the thumbnail boxes show up but they are filled only with text : CDN issues
• No thumbnail boxes show up, even just with text : Javascript issues

CDN:

This has been happening recently; it seems to be related to Cloudflare and high internet usage across the globe.
A few changes were made and this has improved things for many people (for example, pictures currently load fine for me).

Your geographical location may be relevant (cloudflare uses that to decide which server to connect you to). There is also a way for you to find out exactly which server Cloudflare is assigning to you, but I'm not sure if it can be done without traceroute (which requires some technical expertise).

Javascript:

If your Javascript implementation is sufficiently bad, thumbnails will not be loaded onto the page because the API needed to do so is not provided by your browser. In this case your browser, OS, and hardware platform are the relevant details.

(off the top of my head, one such known-bad implementation is on the Wii)