The disk storage limit is 100 mb per account. As far as checking for the amount you have used, I'm not sure, I guess you will have to add up your file sizes. 

Hi Carl,

I don't think we have access to MySQL just yet. I emailed support a few months ago and asked them about it. They said they had no plans to expand on their webhosting services. I do hope this has changed. Maybe they are currently working on it and will provide it in the future.

I would think the only way to do this is to not have the website on the promotional material and have them email you directly asking for more info. Then you could send the the link to the presentation and follow up as needed. This actually gets you a better lead as they are directly asking you for info and you are able to establish a more personal relatiionship with them.