Right now, you have two Toshiba choices, but they are really one and the same. The e800 and e805 are identical, except for the fact that you get slightly different software with one.....I went to Toshiba's site to get you the exact info, but they have changed their site and I can't find it....I think it was ArcSoft imaging software, but don't quote me.
With the e80x, you can do everything you described. I use mine for ebook reading, email, contacts, managing my schedule, listening to WMA\MP3's, DVD viewing (personally owned and not for distribution of course 8) ), MSN Messenger, PowerPoint viewing, Adobe acrobat viewing, personal finance (via MSN Money) and wireless web browsing. I connect to my WLAN at home via the built in 802.11b.
I don't know that I would make it the "hub" of my computer activities....I don't view it is a computer replacement, but rather an extension of my computers and network. The synch cradle does allow USB device hosting, so you could connect a USB keyboard to it. There is also a "presentation pack" that Toshiba sells for $49
here. It allows you to connect the Tosh to a projector or monitor for either 640x480 res or 800x600 res.
I would imagine you could get some external storage that is USB capable, but I don't know that you would need to. If you have large amounts of storage space on your desktop\laptop that you plan to synch to, you could transfer the data to that storage. You also have CF and SD slots.....you could add a CF microdrive which would provide up to 4GB of storage.....should be plenty for a device of that size. Smaller SD or CF cards are also available.
As indicated in the previous post, WM2k3SE is planned as a free upgrade in May. If you want full VGA compatilibity before then, there are 3rd party apps such as ResFix and MyVGA (which I recommend) to allow for that now. I run full 640x480 all of the time on my Tosh and I love it!
Hope this helps.....let us know if you have any other questions or what the decision was....best of luck!
KCT