Reginald P. Smithers III, Esq. wrote:
D.Duck wrote:

Do you know of a good email client that incorporates a calendar that
is similar to Outlook?

They are working on Thunderbird 3 which be both a calendar and email
product.

From Mozilla's web site
Thunderbird 3 will include calendaring, better search, and better
overall user experience, much like Firefox 3. We’re hoping for a release
in late 2008 -- the exact timing will depend on who joins this
collective effort.

I forgot to mention, you can use the Lightning add on until this is released

https://addons.mozilla.org/en-US/thunderbird/addon/2313
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