To expand on what Mike and Becky wrote:
There is no integrated "pending inquiries" system. Like Becky says, that might be a nice thing to add someday.
In a separate G2G thread, someone had suggested that we send cc's of Trusted Lists requests in the same way we send cc's of Private Messages. That is, when you send a Private Message you get a copy of what you sent in your own e-mail inbox. This isn't (yet) true of Trusted List requests.
Like Mike said, Changes and Contributions pages might be useful. If you post comments on profile's bulletin boards those will appear in your Contributions history.
Another thing that might be useful: There's a free space for jotting notes on your Navigation Home Page.
Regarding getting help from a Supervisor if there is no response to your requests, this is the official policy: http://www.wikitree.com/wiki/Unresponsive_Profile_Managers
It's a real problem when people don't respond, but we hate to close someone's account unless it's been a long time since they've participated.