I had the Xoom for about 2 weeks, then returned it for the Asus Transformer. For those having trouble getting the device, I recommend tracking the product here:
ASUS Tablet PC In Stock Tracker - Transformer TF101 - NowInStock.net (not my site). You can get email/sms alerts when it comes in, which is how I managed to get the Tablet, Keyboard, and sleeve all within a week.
As for the Xoom, I really didn't have any serious complaints about it except:
1. The SD slot didn't work. They knew this when they shipped it, kept promising a firmware upgrade to make it work. No idea if this even works now.
2. The 4g/LTE upgrade thing. You will basically have to send it in if you want this, which to my knowledge is also not available yet.
Since you mentioned traveling, I don't believe the 3g (and LTE upgrade when it happens) will work while traveling, so you might as well get the Transformer (although there is a Wifi Xoom) since the keyboard dock is shit hot.