the thunderbird version sounds kind of like poco mail - they have been seeling a flash keychain version of their email software for a while now http://www.pocosystems.com/home/ - they call it email voyager. works slick.
there is an extension for firefox (not sure how it would work on the removable version) to ftp your bookmarks down on launch and up on exit... works pretty good - called bookmarks synchronizer
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the thunderbird version sounds kind of like poco mail - they have been seeling a flash keychain version of their email software for a while now http://www.pocosystems.com/home/ - they call it email voyager. works slick.
there is an extension for firefox (not sure how it would work on the removable version) to ftp your bookmarks down on launch and up on exit... works pretty good - called bookmarks synchronizer