You can have a $500 credit line on any chase card. The 5k requirement is only when opening the card.
This is great to hear -- thanks for the info!! It seems I have maxed out my credit with Chase. I currently have 6 Personal and 1 Business cards, as well as a mortgage; I have opened and closed several other cards with Chase over the past couple years. Most of my current cards have $5K lines.
I'm planning to apply for the new Fairmont card when it comes out next month and knowing this will allow a little more flexibility, if I need to move some credit around. As a lifetime Fairmont Plat the new card looks like it may be a good opportunity.