Why would they be awkward to cut/paste?
At any rate, whenever I have a big post, I usually write it in a text editor till I remove the real names for variabls (replace them with foo, bar, etc) make the appropriate comments, and then cut/paste. If the section I'm in doesn't have a preview, I'll go back one level and check my post. If something looks bad, I go back in and change it.
My posts usually aren't that big, but I've done this one time or another... (also cutting and pasting from console sometimes when I want to double-check code and make sure it works). I suppose having a input type=file wouldn't help me much.
#!/home/bbq/bin/perl
# Trust no1!
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