I think the first question to consider in figuring out if the AEBS is price competitive is this:
Of the following three features, how many do you see yourself as using in the near future, if you get them?
- 802.11n
- Wireless printing to a USB printer
- Wireless hard disk
And finally how many wired ethernet devices do you foresee networking?
I'd personally say that, if you need two or more of the items in the first list, and you don't need more wired devices than you have ports on the AEBS, it's price competitive with comparable products. If you're only at one of the first three (e.g. just printing), it's probably not competitive. You have lots of options in 802.11g-class with printing that are more affordable (including a used 802.11g AEBS -- the most reliable router I've personally ever used, and you can get one now for ~$50).