>Personally I do file uploads asynchronously as AJAX or as an IFrame that's separate from main page content. Alternately, if I need to make sure the data needs to be valid before uploading a file I use a two step submit process to send the upload up - first submit the form data, then when that's been validated on the server redisplay the form with just the file upload (on the same page or a follow on page) and then let them do the upload separately.
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>This allows me to separate out the file upload from the main content and not get in the way of validation and other tasks. If the files to upload are really small I think it's OK to put them on the same page as form data, but otherwise separating the upload process out is a better idea IMHO.

Thanks

As they are usually small, I have them in the same form as the data. However, we do have validations also, from time to time, on the uploaded files. So, this may require a resubmit, even if the upload control(s) would be as part of the form or standalone.