I think it might be some of the internet system between you and SL. The other night I had trouble accessing not only SL, but other distant sites as well. But a local TV station site came in OK on Chrome, but not on Firefox which I use most all the time. When I finally got reconnected to SL there were comments that had been posted while I couldn't connect, so obviously it was not SL that was the problem. At least not 100%.
I don't know, but I kind of think if one of the communication links your local ISP is using half way across the country goes bad, it might take the internet backbone servers awhile to establish an alternate route.
When you have trouble connecting to SL what about other sites? Are they all unreachable? If so, then your local ISP may be the problem. Try pinging SL. Sometimes the connection exists but the browser communication fails. Also, if you have wired cable internet you might be seeing saturation of the local cable link. In other words there is a high possibility that your problem is not your computer nor SL, but the system in between.
This seems the most probable. I can get other sites. I tried at 8:30 am my time no luck and kept trying
through out the day, no luck. Then around 4:30 pm it showed up. Oh well thanks for all the input