I think installing an extra gig of ram would have more performance benefits than the n280, and thats probably the only upgrade this will get
Remember XP home can only access 1gb of ram, you'll need to put on XP pro or 7 for a performance benefit from the increased memory
Not true. Microsoft impose an artificial 1GB memory limit on the sale of XP-Based Netbooks by way of licence. There is nothing stopping a user upgrade.