Congrats on choosing the TLR route!
I'm sure you'll love it (I've got 3 Yashica Baby TLR's and they're sweet!).
It's a different experience, and I totaly agree with Helens assesment of looking AT an image formed on glass rather than looking THROUGH a pentaprism viewfinder. It's so much more about the photograph. Don't panic about the reversed image - it becomes second nature really quickly. I can't use a digicam viewscreen, cause I always pan the wrong way (If only they'd add an option to reverse the image!).
Most people who've never used a TLR think they're big clunky monsters - you'll quickly find they're a simple elegant and unobtrusive design. You can wander around all day shooting stuff, and no one will even notice. No horrid mirror slamming around, no lifting it up to your eyeline(and scaring the natives), no sync speed problems, no batteries...
I'm sure you'll be hooked. Keep an eye out for one the the Yashica 44 tlr's - same design but for 127, so they're about half the size and 1/4 the weight. Now if I could just afford one of the NEW rollei's...