Righty, bin thinking about this today, and here're some points (mainly for the HLP admins to think about, if you please):
1. Try searching for 'FreeSpace 2'. I doubt you'll find HLP on the first page of results. That could really use fixing, though it might need V's help since most results are the V site
2. HLP needs major, shamless pimpage, in as many places as possible. I'm no intarweb expert, but you admins are - however you do it, you should spam the **** out of the gaming community with HLP adverts
3. The HOTU thing needs a massive great 'Get FS2 for free here!!!!' banner or something, on the HLP mainpage. Make it bloody obvious to any casual surfers that they can get the game engine for free and mod the **** out of it
4. Thinking about it some more, the voices and hi-res art at least should be made available somehow. Perhaps you admins should seriously look in to that P2P idea, or find someone with, say, twin T3 lines who could spare the bandwith
5. All mod websites need to make a similar effort to majorly pimp the HOTU download. Like a huge banner advertising it.
6. The HLP mainpage needs more regular updating. Windrunner says he reports all the news that's PM'ed to him... well to be honest a bit more effort of everyone's part would be handy. Tiara, your Azrael skin should have been a news item. Or the crops of screenshots that have sprung up lately. Every new skin, mission or model should be mentioned on the main page, and reviews would be cool too, like a skin of the week section. And a little bit more info in news items, rather than one line saying 'click here' (note, this is nothing against you personally, Windruner). Even something purely spammy, like a weekly grudgematch, would help to keep HLP ticking over and looking fresh up front. I'm not even going to start about the pic of the week...
[EDIt]
7. Oh yes, just thought of another one - what about that jobs/request board? Not a forum to be spamemd and flamed, but simply a board of adverts. Fancy some FREDding but not sure who's in need of staff? Check the board under 'wanted'. Looking for a texturer? Check the 'for hire' section. Want someone to model a ship you saw in a movie? Place an ad in under 'requests'. You see an ad that interests you, you click it and get a brief description with clear and easy contact details. People can delete their adverts whenever they like (ie when the advert is answered or no longer valid), and ads can be deleted automatically if not renewed by the placer every X number of weeks. I personally think this is a bloody good idea.
K, that'll do for now. More to follow, perhaps...