Also keep an eye out round the plant you have - I keep finding little seedlings in the gravel round ours, and I've so far only moved one to another place, but it's doing quite nicely. I can see 4 or 5 more - must get round to moving them somewhere where we will actually want a lavender plant, rather than the middle of the path.
Yes - what is it with rosemary? Ours is enormous, and we don't use it that often in cooking. Sometimes I have to hack it back, and I stick the cuttings in a bucket out the front, with a note to people to help themselves. Sage too.