1) Write in your online journal.
2) Search your online journal at your leisure
3) HAVE YOUR ONLINE JOURNAL PRINTED INTO A beautiful book for posterity or whatever reason.
The first item has definitely been implemented, one hundred times over. The second... well, at least on LJ, it's not all that and a ball of wax, but it's coming along. The third? Unheard of! Especially at any sort of affordable rate. Well, the folks over at pyxlin' are trying to make it happen. They are just starting off, but you can check out their progress on this major project at their - haha - online journal.