"Having said that, I think if you guys offered a service where we could skin our own captcha page that is well worth a premium subscription."
Being worked on (don't know the account level type that will be offered with yet).
"It's an issue with the message and having to wait 5 seconds. Obviously I don't know what you guys are doing behind the scenes during those 5 seconds, but it makes no sense why you guys would display that message or any prompt (seems unnecessary, or rather advertising)."
Don't think there is an easy solution for the 5 seconds (will mention it). Basically, we're running some checks on the visitor to see if they exhibit behaviors of a botnet or other type of attack (generally have some specific signatures during a DDoS). I'm sure we'll figure out a way to speed it up.