You'll probably find a lot of switches but probably never see a gigabit hub - Too much bandwidth for a collision-based half duplex network.
There's a lot of places making gigabit switches - Cisco just came out with a few, as have most of the other major vendors. They are, however, pretty expensive and designed for corporate use.
Also, most of the SOHO vendors (d-link, Linksys, Netgear) are coming out with gigabit over copper. I know that Linksys has a 8-port 10/100 switch with one 1000BaseT port and a PCI NIC package for around $250. Might check some other threads around - There was some discussions.
One more detail - nwfusion.com did a good review of gigabit NIC's - Found that the Intel one was, by far, the best. Not cheap, but the best.
- G