I'm getting problems quite alot too with slow loading or even time-outs when attempting to connect to the site. Other times it gives an error message basically along the lines of "Too many connections to database" and then some errors about SQL. This often seems to happen in early afternoon here, about 1400 or 1500 GMT but in the evenings things are generally fine.

Different browsers and machines don't seem to make any difference in my experience, and the problems also exist if I try to connect from a different internet connection, ie. not at home.