My ideas for now:
1) Let's ask each of the girls to create a personal profile, where they can write their story, or some kind of tale.
2) Let's ask them to compose a cute little poem on a given topic...
3) A story about how you completely crushed us (guys) in Heroes :D, and that we are just a bunch of losers :D
4) Let's organize an online competition, where tricky questions will be asked...
5) A secret (it will only be interesting when it's a surprise)...

Well, I decided to comment on this. I think the idea itself deserves attention, but there are some "buts":
1) and 2) - not all girls have literary talents... Although it's interesting in general... well, they don't necessarily have to write something - for example, Lelya draws well (and so on - you get the idea;)).
3) And will you all not be offended afterwards?;) If we say

and that YOU are just a bunch of losers :D

In general, yes, of course, girls should play Heroes - this is not even up for discussion... but in general, this whole point is debatable, but why not?;)
4) Yeah =) that's nice - but how will you organize any kind of online competition if a) all the girls play different versions of Heroes... b) gathering everyone online at the same time is something out of a fantasy, believe me!! For example, I don't have any time at all... and so on.
5) I love secrets! ;)

Also, ask the girls if they want to participate before adding them to the list. Last time, there were some disagreements and problems with that.

But in general, well, go for it!