My predictions:
MacPro: quad woodcrest @ 3GHz, 1GB ram standard, two high speed video card slots, ATI x1900, or NVIDIA 7950GX2, for first time, ATI FireGL boards available as BTO.
XServe: dual woodcrest, larger hard drives
Airport: "pre-n" announced, ships on new MacPros, available in 6 weeks for standalone devices, upgradable when standard is formalized
Leopard: preview, all of OS now 64bit able, still runs on 32bit machines. Takes full advantage of GPU. The usual slew of apps updated.
XCode: updated to 3.0, API for project files made available, various "features" (ie bugs) fixed