Select ranges based on sequential breaks

Hi,

I'm having difficulty constructing a query that will find breaks where 
data change in a time-series. I've done some searching for this too, but 
I haven't found anything.

Here is my example situation, consider my source table:
date 	bin
2009-01-01 	red
2009-01-02 	red
2009-01-03 	blue
2009-01-04 	blue
2009-01-05 	blue
2009-01-06 	red
2009-01-07 	blue
2009-01-08 	blue
2009-01-09 	red
2009-01-10 	red


I would like to get the first and last of each consecutive series based 
on column "bin". My result for the table would look like:
first 	last 	bin
2009-01-01 	2009-01-02 	red
2009-01-03 	2009-01-05 	blue
2009-01-06 	2009-01-06 	red
2009-01-07 	2009-01-08 	blue
2009-01-09 	2009-01-10 	red


This is easy to compute using a spreadsheet or in R, but how would I do 
this with SQL? I'm using 8.3. Advice is appreciated.

Thanks,

-Mike