Yes this notebook of yours should run vista without any problems. Radeon Mobility X1400 supports aero glass so no problems there too. The only concern for me would be that 1GB Ram chip. I am running vista on my desktop PC PentiumIV 2.8 with 1GB Ram and vista doesnt run as fast as I would like it to run. It eats up alot of memory, something like 650mb without any extra application running. But Microsoft has stated that Beta versions of vista are not optimized so i'll expect them to run pick up some speed once they r optimized. I am not saying that 1GB could be a serious concern for you but if I can go with 2GB chip for vista i'll go for it.
I am planning to get a notebook for myself before my university starts. Intel Duo Core seems to be a perfect choice as they are very good for multi tasking.
Here is what i am going to get:
Intel Duo processor T2500 2GHz
2GB Shared Dual Channel DDR2 at 533Mhz
80GB 7200rpm SATA Hard Drive
Intel? Graphics Media Accelerator 950 (Intel GMA9 because im not buying this notebook for gaming & because it supports aero glass.)