yes, phpinfo - mine is just called info...but that is the one.
since it doesn't appear in there it means it isn't installed and isn't actually a moodle-specific issue (but obviously one a lot of us are encountering since we're expecting it to play nice for moodle). i noticed in my apache error log the attempt for it to be loaded was causing an apache error.
i have seen some people document it working with the 5.2.13 versions of both php_curl.dll as well as libeay32.dll and ssleay32.dll (in the system32 folder) - have you tried that or just 5.2.13 of php_curl.dll? i have also seen some people say that php5ts.dll needs to be in the system32 folder. i have also seen some people report that libeay32.dll, ssleay32.dll and php5ts.dll all need to be in the same folder where php.ini is. and of course you have to restart after each attempt to make this work right.
apparently 5.3 has enough changes to it that it won't work with 5.2 dll files so i wouldn't even go there (though i did, with no success).