Itemizations

[Giuseppe Bilotta <bourbaki@bigfoot.com>]

Hello, I have two questions on itemizations

First question: assume that I have an itemization

1. foo
2. bar
3. baz
4. quuz

and that I lately want to expand baz and quuz. This means that in
another itemization I would have

3. baz
   a. one
   b. two
   c. and three
4. quuz
   a. another
   b. and another
   c. ok

How could I tell the second itemization to start at 3, possibly
linking it to the actual number of baz (so that if baz changes
position, the numbers are always in sync)?

Second question: can I have "running" itemization? Like (1) This
is item 1 and (2) this is item two.

Thanks in advance,

Giuseppe "Oblomov" Bilotta