I think the general consensus is that the most semi-comfortable time you will have on any "normal" internet browsing session is with a version 3 or 4 browser at minimum, but that anything is technically usable depending upon content. That said, basically, eBay and Youtube don't even work particularly well in my 10 year old version of Safari on my G4 tower, but like many other current web pages they make use of a lot of content types and plug-in's that simply did not exist 10 years ago, or 10 years prior to that, or did in only a very infant form.

What I am angling for with the page I am making is basically to have something that will be viewable on the most basic of systems that are still relatively connectable, and capable of using the earliest variants of graphical browsing platforms. This is pretty much acheivable by sticking to basic  legacy protocols and formats, keeping content elements small in size for reasonable load times on bottlenecked old connections, and laying out the page in a way that you can browse from the oldest machinery and still have full functionality (basic though that functionality is by nature).

Unfortunately I am having some issues with connecting to the server to upload the homepage, so unfortunately I am unable to get any usable feedback from people until I get this sorted. I figure once I successfully get a page or two up, I can see what works and what doesnt under real world conditions and go from there.