Well, this isn't early June, this is late June
BTC isn't $30 anymore; we've had a couple difficulty resets. The 5830, for example, has gone from a $12 a day card to $2 + change as of this Friday/Saturday when difficulty resets again.
I was honestly browsing NewEgg just last night wondering if I should get any more cards -- I have open slots -- but I decided that right now I need to make some of my initial investment back. The time to expand is pretty much over, except for maybe "deals" such as used cards.
I'm serious. If NewEgg brought in a couple hundred Sapphire 5830's tomorrow morning for $110 + free shipping, would I buy? I really think I wouldn't. Maybe I'd pick up one; who knows. But it would take 40-50 days for it to pay for itself after this Friday, which is the soonest I'd be able to get the card.
If I had started mining any sooner than I did, I might be in a better position to expand.