There are sites where you pay a small subscription to be able to send big files, infact I think there is actually one called sendbigfiles.com - you could try that, though I guess it also depends on the recipient being able to receive files that big HTH
Mankymummy, the file does not display because most browsers do not have plug-ins that render eps files. First of all, if you have put the path in an <img> tag, don't. That will put a big load on your server as every visit to the page will request the 30mb file!
The simplest way is to use a link to the file like this: <a href="http://www.example.com/path/to/my/file.eps">right click here to download the big file (30mb)>.
If you need to do this a lot there are more professional solutions.