HP has started publishing device drivers and software for Windows 7 for their desktops, notebooks and workstations. A complete overview of Windows 7 eligible models can be found here
Business Desktops
Business Workstations
Business Notebooks
HP EliteBook 2730p Notebook PC
HP EliteBook 6930p Notebook PC
HP EliteBook 2530p Notebook PC
HP EliteBook 8730w Mobile Workstation
HP EliteBook 8530p Notebook PC