As per FoxFour's request, suggestions:
1. Streamlined corp finder which gives a number of parameters a corp can fill out and a player to search for. For instance, a corp can fill out any faction allegiances for FW, a time frame they are most active, mic requirements, age requirements, etc and then the players can search for corps using these parameters as well as narrowing down the search by tax rates, number of players, etc.
2. More things for corps to do, perhaps even a matchmaking system for corps where battles take place in instant battles. Perhaps separate it into three groups - 4v4, 8v8, and 16v16 - then you simply form up your squad of however many players you prefer (this means we'll have to wait for the team deploy feature) and it finds another corp for you to compete against.
3. More benefits to corps. You know one thing a lot of corps want? Their own warbarge. How sweet would it be if you could purchase your own (stealth cloaked

) warbarge that you go to instead of going to the Merc HQ. I mean, you want to try to promote a social environment yet every time we log in we are in an isolated room by ourselves. Add a corp room, as simple as copying the current warbarge, and people will think its cool and want to join a corp for it. If EVE players don't like the thought of this then fine, in the case of EVE-Dust cross corps only do this for the Dust side players.
4. Quick navigation to apply to corporations. Searching for a corporation can take awhile, and even with the idea proposed in point 1 it can still be a bit tedious. But what if you are playing a match and meet some cool people in a corp and think, "Dang, I'd like to join that corp." Well how about when you select their name on the player lists there is a new option, "Apply to this player's corp."
5. Online players love customization beyond no other. Why not allow players to customize their dropsuits and vehicles, maybe even weapons, with their corp colors and logos? People not in a corp will get jealous and want to join, I promise.
6. Allow corp members to put their assets into the corporate assets, then the CEO and directors can determine who has access to corp assets.