Did you read the automatedhome guides I pointed you towards yet?
While a full-height cabinet is overkill, a small wallmount, or even just a couple of brackets to fix a patch panel to is a fine idea - I wouldn't do it any other way than to use a patch panel...
1) You mention 4 rooms. Assuming you only want one location in each room to have a wall outlet, I would put two RJ45 outlets into each faceplate and run the cable now - if you buy two reels it is literally no extra work, and what you want to avoid at all costs is winding up with a series of mini-switches everywhere 5 years from now because you can't be bothered crawling about in the attic, again.
2) With that, 4 rooms x 2 RJ45 = 8 rj45 at your core. Add it up and you'll find a patch panel is probably break-even already, and as a typical 1U patch panel has 24 outlets on it, you have room to expand to additional rooms without having to redo the core later.
3) A proper panel is a lot easier to work with than a series of wall outlets at your core.
4) If you buy a rack-mountable switch (not all that expensive), you then have a nice easy way to tidily interconnect the two.
These things have a habit of spiralling out of control once you get started. I used to have once PC, a printer and that was it, there's now about 15 networked devices in the house.
And you never know, I might one day get around to cabling the house properly myself!

Cobbler's shoes and all that.
Edit - just had a rummage on ebay, 24-port 19" panels can be had from £15 new, £20ish for brand-name ones. That's cheaper than 4 faceplates, 4 backboxes, and 8 RJ45 modules, before you even consider the faffage.
Edited by deleted (Fri 08-Oct-10 13:01:45)