You would think Belgium would be bumped into a seeding just from Clijsters. If Belgium did draw Spain, it would likely result in the "Big 4" in the semis, although if any of the other 3 seeds were shorthanded and had to travel to Italy, there's potential for an upset.
In Group II, it might be interesting to see 4 Asia vs non-Asia matchups. Home court would decide a lot. The 4 Asian teams are better suited to faster surfaces. Patty is the huge X factor. With her, Switzerland is probably the strongest team in the Group. Without her, it could become the weakest. (Pending whether Gagliardi plays. Bacsinszky is still developing, so there's no way of knowing when she might break through.)