I doubt it. TomTom's maps are probably encoded in some propriertary format to stop anyone nicking them to use in other applications, regardless of what other TomTom software you have.
On another note though, Slashdot has some links to news of the TomTom Go personal navigator (self contained GPS unit with TomTom onboard):
http://slashdot.org/article.pl?sid=04/10/2...0&tid=137&tid=1I've seen these advertised on billboards in the UK, but what I didn't realise is they
run on Linux! Better yet TomTom has
released the source code to all the GPL parts of their software, including the kernel. While I doubt they'll release the navigation part of their software like this, it certainly means they're a lot closer to being able to release a version of their software for the Zaurus.