I'd just agree with most posters here that Jaiman and Norek are good places to start. I just started a new campaign in Jaiman. I started it in Rhakhaan because it is one of the few relatively stable places on Emer/Jaiman NOT ruled by an evil overlord, and so it is ideal for starting players out. I began it all in Haalkitaine, since there is a good map for it and the description of this big, relatively safe city is quite detailed. The PCs are currently in Tanara... I think they will probably get to Norek soon as well.
Also, don't forget about The Iron Wind-- that's another part of Jaiman that has been done too. It could easily be integrated with the material from Xa-ar.
I think the 'Tales of the Loremasters' modules also have some short, one-off adventures that you can set pretty much anywhere.
Oh, and if you're looking for lost technology, Tanara is full of old Lords of Essence complexes: the whole Cloudlords complex, some of the Duranaki caves, and the resting places of no less than four unique swords. (These are high-powered weapons, though, so you'd want to wait till your characters get a little higher in level before you make these available to them).
Enjoy!