I've got a pair of inlines, although I don't use them all that much, spend most of my time on the bike.
It is enjoyable, though, and gives you a great workout. Just make sure you learn how to stop before you go too far!
Cycling and any kind of skating are very complementary sports, witness our own Clara Hughes, gold medal in speed skating in Salt Lake City, and a previous gold medal in cycling, one of only four people to win gold in both summer and winter olympics.
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"...perhaps the world needs a little more Canada" - Jean Chretian, 2003.