friends
While I can fully understand if you don't want to continue on a friendship with her in particular, I do wonder a bit about your not wanting to have non-sexual female email friends (as you put it, being a dickless email pal, lol.)
I have quite a few online friends, male and female, that I find it nice to just chat with, bounce ideas off of, shoot the breeze. Sometimes a male friend will have a personal question that they would really like to have a female perspective on but aren't comfortable posting it to the world in a forum. Many are in situations where going out to lunch or whatever with a female coworker would make all kinds of wrong impressions. Turning to me or other female online friends is an excellent way for them to speak personally one-on-one without fear of embarrasment, judgment, or misunderstanding.
Just today I had a friend who really wanted a female perspective on some issues within his relationship. No fear of me thinking he was coming on to me, no fear of me judging him, just a friend helping out another. For him, it was easier talking online than actually having to look at someone. It lowered the embarrasment level and let him just talk, just be himself.
There are times I turn to my male friends for their perspective on various issues or their thoughts on certain situations, everything from spirituality to politics to work to whatever. For me, it helps to see more angles, more facets of life in general and keeps me feeling more balanced and more able to look at things objectively from all sides, not just a feminine perspective. I feel I've been blessed by having friends from all over the world of both sexes that I can speak to. It's really helped broaden my outlook on many things in many different areas. I feel like I'd have missed out on a lot of very good insight had I just regulated my online email conversations to same sex friends or potential partners. =)
Anyway, just a thought. =)